Public sector (B2G)

E-invoicing to public sector bodies in Greece, following the EN 16931 standard. You send the same JSON as for a normal invoice, to the SendInvoicesB2G endpoint, with three additions:

1. the providerB2gAdditionalInvoiceDetails block (contract, budget, public body),
2. on every line: QuantityUnitsUblCode, itemClassificationIdentifiers (CPV) and itemCodification,
3. taxes and deductions only through taxesTotals (Taxes).

Before the first invoice to a public body

Your customer contacts the public body and confirms the routing details: Contracting Authority Code, budget type, contract ID (ΑΔΑΜ), and the ΑΔΑ (Diavgeia decision number) of the budget commitment. Wrong details mean that the invoice does not reach the right payment system.

Rules

Rule
Types	1.1, 1.6, 2.1, 2.4, 3.1, 3.2, 5.2, 6.1, 6.2, 7.1
Payment method	Always type: 5 (on credit)
Taxes / deductions	Only in taxesTotals
Credits	1 per invoice, from a separate B2G balance

providerB2gAdditionalInvoiceDetails

Field	EN 16931	What you enter
contractReference	BT-12	Contract ID (ΑΔΑΜ) in the public procurement register (ΚΗΜΔΗΣ). "0" if there is none. Empty on a credit note.
purchaseOrderReference	BT-13	Purchase order number of the public body, if there is one.
buyerReference	BT-10	Department of the public body that receives the invoice.
buyerLegalRegistrationIdentifier	BT-47	Legal registration identifier of the buyer.
buyerIdentifiers[].buyerIdentifier	BT-46	Routing: the Contracting Authority Code from the Register of Contracting Authorities (e.g. 1007.909.0001).
budget.type	BT-11	1 Regular Budget · 2 Public Investment Programme (ΠΔΕ) · 3 other.
budget.identifier	BT-11	For 1 and 3: the ΑΔΑ (Diavgeia decision number) of the budget commitment. For 2: the project registration number (Ενάριθμος). On a credit note, for 1 and 3, empty.
credits[].accountIdentifier	BT-84	IBAN of the issuer.
credits[].accountName	BT-85	Account holder.
credits[].serviceProviderIdentifier	BT-86	BIC of the bank.
dueDate	BT-9	Payment due date (yyyy-MM-dd).
partyName	BT-70	Who the goods or services are delivered to.
deliveryDetails (street, city, postalCode)	BT-75/77/78	Delivery address.

Per line

Field	EN 16931	What you enter
QuantityUnitsUblCode	BT-130	Unit per UN/ECE Rec. 20, e.g. EA (each), KGM, LTR, HUR.
itemClassificationIdentifiers[]	BT-158	CPV code: classificationIdentifier (e.g. 15555100-4), classificationIdentifierScheme = STI, classificationIdentifierSchemeVersion (e.g. 2008).
itemCodification	BT-153	Short item name.

Testing in the sandbox

For B2G you need a separate sandbox API key. Ask Novus for it. In your tests you must send these values:

Field	Value
issuer.vatNumber	177472438
counterpart.vatNumber	997875116
buyerIdentifiers[].buyerIdentifier	1007.909.0001
invoiceHeader.series	The VAT number you use in your tests (123456789 in the examples)

Ready-made examples

1.1 — Sales invoice

Download

{
  "invoice": [
    {
      "issuer": {
        "vatNumber": "177472438",
        "country": "GR",
        "branch": 0
      },
      "counterpart": {
        "vatNumber": "997875116",
        "country": "GR",
        "branch": 0,
        "address": {
          "street": "Οδός Πελάτη",
          "number": "10",
          "postalCode": "15772",
          "city": "Ζωγράφου"
        }
      },
      "invoiceHeader": {
        "series": "123456789",
        "aa": "1022",
        "issueDate": "2026-09-24",
        "invoiceType": "1.1",
        "currency": "EUR",
        "dispatchDate": "2026-09-24",
        "dispatchTime": "10:00:00",
        "vehicleNumber": "ABC-1234",
        "movePurpose": 1,
        "movePurposeLabel": "Πώληση"
      },
      "paymentMethods": [
        {
          "type": 5,
          "amount": 124.25
        }
      ],
      "invoiceDetails": [
        {
          "lineNumber": 1,
          "lineCode": "655-000023",
          "QuantityUnitsUblCode": "EA",
          "quantity": 1,
          "measurementUnitLabel": "ΤΜΧ",
          "lineUnitPrice": 120,
          "totalNetPriceBeforeDiscount": 120,
          "totalDiscountValue": 20,
          "netValue": 100,
          "vatCategory": 1,
          "vatCategoryPercent": 24,
          "vatAmount": 24,
          "lineDescription": "Αντικατάσταση Λέβητα",
          "incomeClassification": [
            {
              "classificationType": "E3_561_001",
              "classificationCategory": "category1_1",
              "amount": 100
            }
          ],
          "itemClassificationIdentifiers": [
            {
              "classificationIdentifier": "15555100-4",
              "classificationIdentifierScheme": "STI",
              "classificationIdentifierSchemeVersion": "2008"
            }
          ],
          "itemCodification": "ΓΙΑ.ΠΡ.ΠΑΡ.ΠΗΛ.950ΓΡ."
        }
      ],
      "taxesTotals": [
        {
          "taxType": 3,
          "taxCategory": 4,
          "underlyingValue": 1,
          "taxAmount": 0.25,
          "reducesPayable": false,
          "taxTypeLabel": "ksenodoxeio 4.00"
        }
      ],
      "invoiceSummary": {
        "totalNetValue": 100,
        "totalVatAmount": 24,
        "totalWithheldAmount": 0,
        "totalFeesAmount": 0,
        "totalStampDutyAmount": 0,
        "totalOtherTaxesAmount": 0.25,
        "totalDeductionsAmount": 0,
        "totalGrossValue": 124.25,
        "incomeClassification": [
          {
            "classificationType": "E3_561_001",
            "classificationCategory": "category1_1",
            "amount": 100
          }
        ]
      },
      "providerAdditionalInvoiceDetails": {
        "issuer": {
          "name": "TEST ISSUER ΙΚΕ",
          "profession": "Εμπόριο ειδών θέρμανσης",
          "taxoffice": "Α' Αθηνών",
          "addressStreet": "Οδός Δοκιμής",
          "addressNumber": "1",
          "addressPostalCode": "10431",
          "addressCity": "Αθήνα",
          "addressCountry": "Ελλάδα",
          "phone": "2100000000",
          "email": "info@example.com",
          "webSite": "www.example.com",
          "registryNumber": "ΓΕΜΗ: 000000000000",
          "emtyLine2": "IBAN: GR00 0000 0000 0000 0000 0000 000"
        },
        "counterpart": {
          "code": "C-0001",
          "name": "TEST CLIENT ΑΕ",
          "profession": "Χονδρικό εμπόριο",
          "taxoffice": "Ζωγράφου",
          "addressStreet": "Οδός Πελάτη",
          "addressNumber": "10",
          "addressPostalCode": "15772",
          "addressCity": "Ζωγράφου",
          "addressCountry": "Ελλάδα",
          "phone": "2100000001",
          "email": "client@example.com"
        },
        "additionalDetails": {
          "documentLabel": "Τιμολόγιο Πώλησης",
          "documentLanguageCode": "EL",
          "documentSizeCode": 0,
          "documentComments": "Εξόφληση εντός 30 ημερών.",
          "paymentMethodInvoiceLabel": "Επί πιστώσει"
        }
      },
      "providerB2gAdditionalInvoiceDetails": {
        "contractReference": "26SYMV000000001",
        "buyerReference": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "buyerLegalRegistrationIdentifier": "123412312",
        "credits": [
          {
            "accountIdentifier": "GR00 0000 0000 0000 0000 0000 000",
            "accountName": "TEST ISSUER ΙΚΕ",
            "serviceProviderIdentifier": "BANKGRAA"
          }
        ],
        "partyName": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "dueDate": "2026-10-24",
        "budget": {
          "type": 1,
          "identifier": "123412312"
        },
        "buyerIdentifiers": [
          {
            "buyerIdentifier": "1007.909.0001"
          }
        ],
        "deliveryDetails": {
          "street": "Οδός Φορέα 1",
          "city": "Αθήνα",
          "postalCode": "10431"
        }
      }
    }
  ]
}

1.1 — with VAT exemption

Download

{
  "invoice": [
    {
      "issuer": {
        "vatNumber": "177472438",
        "country": "GR",
        "branch": 0
      },
      "counterpart": {
        "vatNumber": "997875116",
        "country": "GR",
        "branch": 0,
        "address": {
          "street": "Οδός Πελάτη",
          "number": "10",
          "postalCode": "15772",
          "city": "Ζωγράφου"
        }
      },
      "invoiceHeader": {
        "series": "123456789",
        "aa": "1023",
        "issueDate": "2026-09-24",
        "invoiceType": "1.1",
        "currency": "EUR",
        "dispatchDate": "2026-09-24",
        "dispatchTime": "10:00:00",
        "vehicleNumber": "ABC-1234",
        "movePurpose": 1,
        "movePurposeLabel": "Πώληση"
      },
      "paymentMethods": [
        {
          "type": 5,
          "amount": 112
        }
      ],
      "invoiceDetails": [
        {
          "lineNumber": 1,
          "lineCode": "655-000023",
          "QuantityUnitsUblCode": "EA",
          "quantity": 1,
          "measurementUnitLabel": "ΤΜΧ",
          "lineUnitPrice": 50,
          "totalNetPriceBeforeDiscount": 50,
          "totalDiscountValue": 0,
          "netValue": 50,
          "vatCategory": 7,
          "vatCategoryPercent": 0,
          "vatAmount": 0,
          "vatExemptionCategory": 6,
          "vatExemptionCategoryLabel": "Χωρίς ΦΠΑ - άρθρο 24 του Κώδικα ΦΠΑ",
          "lineDescription": "Αντικατάσταση Λέβητα",
          "incomeClassification": [
            {
              "classificationType": "E3_561_001",
              "classificationCategory": "category1_1",
              "amount": 50
            }
          ],
          "itemClassificationIdentifiers": [
            {
              "classificationIdentifier": "15555100-4",
              "classificationIdentifierScheme": "STI",
              "classificationIdentifierSchemeVersion": "2008"
            }
          ],
          "itemCodification": "ΓΙΑ.ΠΡ.ΠΑΡ.ΠΗΛ.950ΓΡ."
        },
        {
          "lineNumber": 2,
          "lineCode": "655-000023",
          "QuantityUnitsUblCode": "EA",
          "quantity": 1,
          "measurementUnitLabel": "ΤΜΧ",
          "lineUnitPrice": 50,
          "totalNetPriceBeforeDiscount": 50,
          "totalDiscountValue": 0,
          "netValue": 50,
          "vatCategory": 1,
          "vatCategoryPercent": 24,
          "vatAmount": 12,
          "lineDescription": "Αντικατάσταση Λέβητα",
          "incomeClassification": [
            {
              "classificationType": "E3_561_001",
              "classificationCategory": "category1_1",
              "amount": 50
            }
          ],
          "itemClassificationIdentifiers": [
            {
              "classificationIdentifier": "15555100-4",
              "classificationIdentifierScheme": "STI",
              "classificationIdentifierSchemeVersion": "2008"
            }
          ],
          "itemCodification": "ΓΙΑ.ΠΡ.ΠΑΡ.ΠΗΛ.950ΓΡ."
        }
      ],
      "invoiceSummary": {
        "totalNetValue": 100,
        "totalVatAmount": 12,
        "totalWithheldAmount": 0,
        "totalFeesAmount": 0,
        "totalStampDutyAmount": 0,
        "totalOtherTaxesAmount": 0,
        "totalDeductionsAmount": 0,
        "totalGrossValue": 112,
        "incomeClassification": [
          {
            "classificationType": "E3_561_001",
            "classificationCategory": "category1_1",
            "amount": 100
          }
        ]
      },
      "providerAdditionalInvoiceDetails": {
        "issuer": {
          "name": "TEST ISSUER ΙΚΕ",
          "profession": "Εμπόριο ειδών θέρμανσης",
          "taxoffice": "Α' Αθηνών",
          "addressStreet": "Οδός Δοκιμής",
          "addressNumber": "1",
          "addressPostalCode": "10431",
          "addressCity": "Αθήνα",
          "addressCountry": "Ελλάδα",
          "phone": "2100000000",
          "email": "info@example.com",
          "webSite": "www.example.com",
          "registryNumber": "ΓΕΜΗ: 000000000000",
          "emtyLine2": "IBAN: GR00 0000 0000 0000 0000 0000 000"
        },
        "counterpart": {
          "code": "C-0001",
          "name": "TEST CLIENT ΑΕ",
          "profession": "Χονδρικό εμπόριο",
          "taxoffice": "Ζωγράφου",
          "addressStreet": "Οδός Πελάτη",
          "addressNumber": "10",
          "addressPostalCode": "15772",
          "addressCity": "Ζωγράφου",
          "addressCountry": "Ελλάδα",
          "phone": "2100000001",
          "email": "client@example.com"
        },
        "additionalDetails": {
          "documentLabel": "Τιμολόγιο Πώλησης",
          "documentLanguageCode": "EL",
          "documentSizeCode": 0,
          "documentComments": "Εξόφληση εντός 30 ημερών.",
          "paymentMethodInvoiceLabel": "Επί πιστώσει"
        }
      },
      "providerB2gAdditionalInvoiceDetails": {
        "contractReference": "26SYMV000000001",
        "buyerReference": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "buyerLegalRegistrationIdentifier": "123412312",
        "credits": [
          {
            "accountIdentifier": "GR00 0000 0000 0000 0000 0000 000",
            "accountName": "TEST ISSUER ΙΚΕ",
            "serviceProviderIdentifier": "BANKGRAA"
          }
        ],
        "partyName": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "dueDate": "2026-10-24",
        "budget": {
          "type": 1,
          "identifier": "123412312"
        },
        "buyerIdentifiers": [
          {
            "buyerIdentifier": "1007.909.0001"
          }
        ],
        "deliveryDetails": {
          "street": "Οδός Φορέα 1",
          "city": "Αθήνα",
          "postalCode": "10431"
        }
      }
    }
  ]
}

1.1 — Fuel invoice

Download

{
  "invoice": [
    {
      "issuer": {
        "vatNumber": "177472438",
        "country": "GR",
        "branch": 0
      },
      "counterpart": {
        "vatNumber": "997875116",
        "country": "GR",
        "branch": 0,
        "address": {
          "street": "Οδός Πελάτη",
          "number": "10",
          "postalCode": "15772",
          "city": "Ζωγράφου"
        }
      },
      "invoiceHeader": {
        "series": "123456789",
        "aa": "1024",
        "issueDate": "2026-09-24",
        "invoiceType": "1.1",
        "currency": "EUR",
        "dispatchDate": "2026-09-24",
        "dispatchTime": "10:00:00",
        "vehicleNumber": "ABC-1234",
        "movePurpose": 1,
        "movePurposeLabel": "Πώληση",
        "fuelInvoice": true
      },
      "paymentMethods": [
        {
          "type": 5,
          "amount": 124.25
        }
      ],
      "invoiceDetails": [
        {
          "lineNumber": 1,
          "lineCode": "655-000023",
          "QuantityUnitsUblCode": "EA",
          "quantity": 1,
          "fuelCode": 40,
          "measurementUnitLabel": "ΤΜΧ",
          "lineUnitPrice": 120,
          "totalNetPriceBeforeDiscount": 120,
          "totalDiscountValue": 20,
          "netValue": 100,
          "vatCategory": 1,
          "vatCategoryPercent": 24,
          "vatAmount": 24,
          "lineDescription": "Αντικατάσταση Λέβητα",
          "incomeClassification": [
            {
              "classificationType": "E3_561_001",
              "classificationCategory": "category1_1",
              "amount": 100
            }
          ],
          "itemClassificationIdentifiers": [
            {
              "classificationIdentifier": "15555100-4",
              "classificationIdentifierScheme": "STI",
              "classificationIdentifierSchemeVersion": "2008"
            }
          ],
          "itemCodification": "ΓΙΑ.ΠΡ.ΠΑΡ.ΠΗΛ.950ΓΡ."
        }
      ],
      "taxesTotals": [
        {
          "taxType": 3,
          "taxCategory": 4,
          "underlyingValue": 1,
          "taxAmount": 0.25,
          "reducesPayable": false,
          "taxTypeLabel": "ksenodoxeio 4.00"
        }
      ],
      "invoiceSummary": {
        "totalNetValue": 100,
        "totalVatAmount": 24,
        "totalWithheldAmount": 0,
        "totalFeesAmount": 0,
        "totalStampDutyAmount": 0,
        "totalOtherTaxesAmount": 0.25,
        "totalDeductionsAmount": 0,
        "totalGrossValue": 124.25,
        "incomeClassification": [
          {
            "classificationType": "E3_561_001",
            "classificationCategory": "category1_1",
            "amount": 100
          }
        ]
      },
      "providerAdditionalInvoiceDetails": {
        "issuer": {
          "name": "TEST ISSUER ΙΚΕ",
          "profession": "Εμπόριο ειδών θέρμανσης",
          "taxoffice": "Α' Αθηνών",
          "addressStreet": "Οδός Δοκιμής",
          "addressNumber": "1",
          "addressPostalCode": "10431",
          "addressCity": "Αθήνα",
          "addressCountry": "Ελλάδα",
          "phone": "2100000000",
          "email": "info@example.com",
          "webSite": "www.example.com",
          "registryNumber": "ΓΕΜΗ: 000000000000",
          "emtyLine2": "IBAN: GR00 0000 0000 0000 0000 0000 000"
        },
        "counterpart": {
          "code": "C-0001",
          "name": "TEST CLIENT ΑΕ",
          "profession": "Χονδρικό εμπόριο",
          "taxoffice": "Ζωγράφου",
          "addressStreet": "Οδός Πελάτη",
          "addressNumber": "10",
          "addressPostalCode": "15772",
          "addressCity": "Ζωγράφου",
          "addressCountry": "Ελλάδα",
          "phone": "2100000001",
          "email": "client@example.com"
        },
        "additionalDetails": {
          "documentLabel": "Τιμολόγιο Πώλησης",
          "documentLanguageCode": "EL",
          "documentSizeCode": 0,
          "documentComments": "Εξόφληση εντός 30 ημερών.",
          "paymentMethodInvoiceLabel": "Επί πιστώσει"
        }
      },
      "providerB2gAdditionalInvoiceDetails": {
        "contractReference": "26SYMV000000001",
        "buyerReference": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "buyerLegalRegistrationIdentifier": "123412312",
        "credits": [
          {
            "accountIdentifier": "GR00 0000 0000 0000 0000 0000 000",
            "accountName": "TEST ISSUER ΙΚΕ",
            "serviceProviderIdentifier": "BANKGRAA"
          }
        ],
        "partyName": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "dueDate": "2026-10-24",
        "budget": {
          "type": 1,
          "identifier": "123412312"
        },
        "buyerIdentifiers": [
          {
            "buyerIdentifier": "1007.909.0001"
          }
        ],
        "deliveryDetails": {
          "street": "Οδός Φορέα 1",
          "city": "Αθήνα",
          "postalCode": "10431"
        }
      }
    }
  ]
}

1.1 — Sales invoice / delivery note

Download

{
  "invoice": [
    {
      "issuer": {
        "vatNumber": "177472438",
        "country": "GR",
        "branch": 0
      },
      "counterpart": {
        "vatNumber": "997875116",
        "country": "GR",
        "branch": 0,
        "address": {
          "street": "Οδός Πελάτη",
          "number": "10",
          "postalCode": "15772",
          "city": "Ζωγράφου"
        }
      },
      "invoiceHeader": {
        "series": "123456789",
        "aa": "1025",
        "issueDate": "2026-09-24",
        "invoiceType": "1.1",
        "currency": "EUR",
        "dispatchDate": "2026-09-24",
        "dispatchTime": "10:00:00",
        "vehicleNumber": "ABC-1234",
        "movePurpose": 1,
        "movePurposeLabel": "Πώληση",
        "isDeliveryNote": true,
        "otherDeliveryNoteHeader": {
          "loadingAddress": {
            "street": "Οδός Αποθήκης",
            "number": "5",
            "postalCode": "19300",
            "city": "Ασπρόπυργος"
          },
          "deliveryAddress": {
            "street": "Οδός Πελάτη",
            "number": "10",
            "postalCode": "15772",
            "city": "Ζωγράφου"
          },
          "startShippingBranch": 0,
          "completeShippingBranch": 0
        }
      },
      "paymentMethods": [
        {
          "type": 5,
          "amount": 124.25
        }
      ],
      "invoiceDetails": [
        {
          "lineNumber": 1,
          "lineCode": "655-000023",
          "QuantityUnitsUblCode": "EA",
          "quantity": 1,
          "itemDescr": "Αντικατάσταση Λέβητα",
          "measurementUnit": 1,
          "measurementUnitLabel": "ΤΜΧ",
          "lineUnitPrice": 120,
          "totalNetPriceBeforeDiscount": 120,
          "totalDiscountValue": 20,
          "netValue": 100,
          "vatCategory": 1,
          "vatCategoryPercent": 24,
          "vatAmount": 24,
          "lineDescription": "Αντικατάσταση Λέβητα",
          "incomeClassification": [
            {
              "classificationType": "E3_561_001",
              "classificationCategory": "category1_1",
              "amount": 100
            }
          ],
          "itemClassificationIdentifiers": [
            {
              "classificationIdentifier": "15555100-4",
              "classificationIdentifierScheme": "STI",
              "classificationIdentifierSchemeVersion": "2008"
            }
          ],
          "itemCodification": "ΓΙΑ.ΠΡ.ΠΑΡ.ΠΗΛ.950ΓΡ."
        }
      ],
      "taxesTotals": [
        {
          "taxType": 3,
          "taxCategory": 4,
          "underlyingValue": 1,
          "taxAmount": 0.25,
          "reducesPayable": false,
          "taxTypeLabel": "ksenodoxeio 4.00"
        }
      ],
      "invoiceSummary": {
        "totalNetValue": 100,
        "totalVatAmount": 24,
        "totalWithheldAmount": 0,
        "totalFeesAmount": 0,
        "totalStampDutyAmount": 0,
        "totalOtherTaxesAmount": 0.25,
        "totalDeductionsAmount": 0,
        "totalGrossValue": 124.25,
        "incomeClassification": [
          {
            "classificationType": "E3_561_001",
            "classificationCategory": "category1_1",
            "amount": 100
          }
        ]
      },
      "providerAdditionalInvoiceDetails": {
        "issuer": {
          "name": "TEST ISSUER ΙΚΕ",
          "profession": "Εμπόριο ειδών θέρμανσης",
          "taxoffice": "Α' Αθηνών",
          "addressStreet": "Οδός Δοκιμής",
          "addressNumber": "1",
          "addressPostalCode": "10431",
          "addressCity": "Αθήνα",
          "addressCountry": "Ελλάδα",
          "phone": "2100000000",
          "email": "info@example.com",
          "webSite": "www.example.com",
          "registryNumber": "ΓΕΜΗ: 000000000000",
          "emtyLine2": "IBAN: GR00 0000 0000 0000 0000 0000 000"
        },
        "counterpart": {
          "code": "C-0001",
          "name": "TEST CLIENT ΑΕ",
          "profession": "Χονδρικό εμπόριο",
          "taxoffice": "Ζωγράφου",
          "addressStreet": "Οδός Πελάτη",
          "addressNumber": "10",
          "addressPostalCode": "15772",
          "addressCity": "Ζωγράφου",
          "addressCountry": "Ελλάδα",
          "phone": "2100000001",
          "email": "client@example.com"
        },
        "additionalDetails": {
          "documentLabel": "Τιμολόγιο Πώλησης",
          "documentLanguageCode": "EL",
          "documentSizeCode": 0,
          "documentComments": "Εξόφληση εντός 30 ημερών.",
          "paymentMethodInvoiceLabel": "Επί πιστώσει",
          "dispatchPlaceFrom": "Οδός Αποθήκης 5, 19300 Ασπρόπυργος",
          "dispatchPlaceTo": "Οδός Πελάτη 10, 15772 Ζωγράφου"
        }
      },
      "providerB2gAdditionalInvoiceDetails": {
        "contractReference": "26SYMV000000001",
        "buyerReference": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "buyerLegalRegistrationIdentifier": "123412312",
        "credits": [
          {
            "accountIdentifier": "GR00 0000 0000 0000 0000 0000 000",
            "accountName": "TEST ISSUER ΙΚΕ",
            "serviceProviderIdentifier": "BANKGRAA"
          }
        ],
        "partyName": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "dueDate": "2026-10-24",
        "budget": {
          "type": 1,
          "identifier": "123412312"
        },
        "buyerIdentifiers": [
          {
            "buyerIdentifier": "1007.909.0001"
          }
        ],
        "deliveryDetails": {
          "street": "Οδός Φορέα 1",
          "city": "Αθήνα",
          "postalCode": "10431"
        }
      }
    }
  ]
}

2.1 — Service invoice

Download

{
  "invoice": [
    {
      "issuer": {
        "vatNumber": "177472438",
        "country": "GR",
        "branch": 0
      },
      "counterpart": {
        "vatNumber": "997875116",
        "country": "GR",
        "branch": 0,
        "address": {
          "street": "Οδός Πελάτη",
          "number": "10",
          "postalCode": "15772",
          "city": "Ζωγράφου"
        }
      },
      "invoiceHeader": {
        "series": "123456789",
        "aa": "1026",
        "issueDate": "2026-09-24",
        "invoiceType": "2.1",
        "currency": "EUR"
      },
      "paymentMethods": [
        {
          "type": 5,
          "amount": 124.25
        }
      ],
      "invoiceDetails": [
        {
          "lineNumber": 1,
          "lineCode": "655-000023",
          "QuantityUnitsUblCode": "EA",
          "quantity": 1,
          "measurementUnitLabel": "ΤΜΧ",
          "lineUnitPrice": 120,
          "totalNetPriceBeforeDiscount": 120,
          "totalDiscountValue": 20,
          "netValue": 100,
          "vatCategory": 1,
          "vatCategoryPercent": 24,
          "vatAmount": 24,
          "lineDescription": "Αντικατάσταση Λέβητα",
          "incomeClassification": [
            {
              "classificationType": "E3_561_001",
              "classificationCategory": "category1_3",
              "amount": 100
            }
          ],
          "itemClassificationIdentifiers": [
            {
              "classificationIdentifier": "15555100-4",
              "classificationIdentifierScheme": "STI",
              "classificationIdentifierSchemeVersion": "2008"
            }
          ],
          "itemCodification": "ΓΙΑ.ΠΡ.ΠΑΡ.ΠΗΛ.950ΓΡ."
        }
      ],
      "taxesTotals": [
        {
          "taxType": 3,
          "taxCategory": 4,
          "underlyingValue": 1,
          "taxAmount": 0.25,
          "reducesPayable": false,
          "taxTypeLabel": "ksenodoxeio 4.00"
        }
      ],
      "invoiceSummary": {
        "totalNetValue": 100,
        "totalVatAmount": 24,
        "totalWithheldAmount": 0,
        "totalFeesAmount": 0,
        "totalStampDutyAmount": 0,
        "totalOtherTaxesAmount": 0.25,
        "totalDeductionsAmount": 0,
        "totalGrossValue": 124.25,
        "incomeClassification": [
          {
            "classificationType": "E3_561_001",
            "classificationCategory": "category1_3",
            "amount": 100
          }
        ]
      },
      "providerAdditionalInvoiceDetails": {
        "issuer": {
          "name": "TEST ISSUER ΙΚΕ",
          "profession": "Εμπόριο ειδών θέρμανσης",
          "taxoffice": "Α' Αθηνών",
          "addressStreet": "Οδός Δοκιμής",
          "addressNumber": "1",
          "addressPostalCode": "10431",
          "addressCity": "Αθήνα",
          "addressCountry": "Ελλάδα",
          "phone": "2100000000",
          "email": "info@example.com",
          "webSite": "www.example.com",
          "registryNumber": "ΓΕΜΗ: 000000000000",
          "emtyLine2": "IBAN: GR00 0000 0000 0000 0000 0000 000"
        },
        "counterpart": {
          "code": "C-0001",
          "name": "TEST CLIENT ΑΕ",
          "profession": "Χονδρικό εμπόριο",
          "taxoffice": "Ζωγράφου",
          "addressStreet": "Οδός Πελάτη",
          "addressNumber": "10",
          "addressPostalCode": "15772",
          "addressCity": "Ζωγράφου",
          "addressCountry": "Ελλάδα",
          "phone": "2100000001",
          "email": "client@example.com"
        },
        "additionalDetails": {
          "documentLabel": "Τιμολόγιο Πώλησης",
          "documentLanguageCode": "EL",
          "documentSizeCode": 0,
          "documentComments": "Εξόφληση εντός 30 ημερών.",
          "paymentMethodInvoiceLabel": "Επί πιστώσει"
        }
      },
      "providerB2gAdditionalInvoiceDetails": {
        "contractReference": "26SYMV000000001",
        "buyerReference": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "buyerLegalRegistrationIdentifier": "123412312",
        "credits": [
          {
            "accountIdentifier": "GR00 0000 0000 0000 0000 0000 000",
            "accountName": "TEST ISSUER ΙΚΕ",
            "serviceProviderIdentifier": "BANKGRAA"
          }
        ],
        "partyName": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "dueDate": "2026-10-24",
        "budget": {
          "type": 1,
          "identifier": "123412312"
        },
        "buyerIdentifiers": [
          {
            "buyerIdentifier": "1007.909.0001"
          }
        ],
        "deliveryDetails": {
          "street": "Οδός Φορέα 1",
          "city": "Αθήνα",
          "postalCode": "10431"
        }
      }
    }
  ]
}

5.2 — Credit note

Download

{
  "invoice": [
    {
      "issuer": {
        "vatNumber": "177472438",
        "country": "GR",
        "branch": 0
      },
      "counterpart": {
        "vatNumber": "997875116",
        "country": "GR",
        "branch": 0,
        "address": {
          "street": "Οδός Πελάτη",
          "number": "10",
          "postalCode": "15772",
          "city": "Ζωγράφου"
        }
      },
      "invoiceHeader": {
        "series": "123456789",
        "aa": "1027",
        "issueDate": "2026-09-24",
        "invoiceType": "5.2",
        "currency": "EUR"
      },
      "paymentMethods": [
        {
          "type": 5,
          "amount": 124.25
        }
      ],
      "invoiceDetails": [
        {
          "lineNumber": 1,
          "lineCode": "655-000023",
          "QuantityUnitsUblCode": "EA",
          "quantity": 1,
          "measurementUnitLabel": "ΤΜΧ",
          "lineUnitPrice": 120,
          "totalNetPriceBeforeDiscount": 120,
          "totalDiscountValue": 20,
          "netValue": 100,
          "vatCategory": 1,
          "vatCategoryPercent": 24,
          "vatAmount": 24,
          "lineDescription": "Αντικατάσταση Λέβητα",
          "incomeClassification": [
            {
              "classificationType": "E3_561_001",
              "classificationCategory": "category1_3",
              "amount": 100
            }
          ],
          "itemClassificationIdentifiers": [
            {
              "classificationIdentifier": "15555100-4",
              "classificationIdentifierScheme": "STI",
              "classificationIdentifierSchemeVersion": "2008"
            }
          ],
          "itemCodification": "ΓΙΑ.ΠΡ.ΠΑΡ.ΠΗΛ.950ΓΡ."
        }
      ],
      "taxesTotals": [
        {
          "taxType": 3,
          "taxCategory": 4,
          "underlyingValue": 1,
          "taxAmount": 0.25,
          "reducesPayable": false,
          "taxTypeLabel": "ksenodoxeio 4.00"
        }
      ],
      "invoiceSummary": {
        "totalNetValue": 100,
        "totalVatAmount": 24,
        "totalWithheldAmount": 0,
        "totalFeesAmount": 0,
        "totalStampDutyAmount": 0,
        "totalOtherTaxesAmount": 0.25,
        "totalDeductionsAmount": 0,
        "totalGrossValue": 124.25,
        "incomeClassification": [
          {
            "classificationType": "E3_561_001",
            "classificationCategory": "category1_3",
            "amount": 100
          }
        ]
      },
      "providerAdditionalInvoiceDetails": {
        "issuer": {
          "name": "TEST ISSUER ΙΚΕ",
          "profession": "Εμπόριο ειδών θέρμανσης",
          "taxoffice": "Α' Αθηνών",
          "addressStreet": "Οδός Δοκιμής",
          "addressNumber": "1",
          "addressPostalCode": "10431",
          "addressCity": "Αθήνα",
          "addressCountry": "Ελλάδα",
          "phone": "2100000000",
          "email": "info@example.com",
          "webSite": "www.example.com",
          "registryNumber": "ΓΕΜΗ: 000000000000",
          "emtyLine2": "IBAN: GR00 0000 0000 0000 0000 0000 000"
        },
        "counterpart": {
          "code": "C-0001",
          "name": "TEST CLIENT ΑΕ",
          "profession": "Χονδρικό εμπόριο",
          "taxoffice": "Ζωγράφου",
          "addressStreet": "Οδός Πελάτη",
          "addressNumber": "10",
          "addressPostalCode": "15772",
          "addressCity": "Ζωγράφου",
          "addressCountry": "Ελλάδα",
          "phone": "2100000001",
          "email": "client@example.com"
        },
        "additionalDetails": {
          "documentLabel": "Τιμολόγιο Πώλησης",
          "documentLanguageCode": "EL",
          "documentSizeCode": 0,
          "documentComments": "Εξόφληση εντός 30 ημερών.",
          "paymentMethodInvoiceLabel": "Επί πιστώσει"
        }
      },
      "providerB2gAdditionalInvoiceDetails": {
        "contractReference": "",
        "buyerReference": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "buyerLegalRegistrationIdentifier": "123412312",
        "credits": [
          {
            "accountIdentifier": "GR00 0000 0000 0000 0000 0000 000",
            "accountName": "TEST ISSUER ΙΚΕ",
            "serviceProviderIdentifier": "BANKGRAA"
          }
        ],
        "partyName": "ΔΟΚΙΜΑΣΤΙΚΟΣ ΦΟΡΕΑΣ",
        "dueDate": "2026-10-24",
        "budget": {
          "type": 1,
          "identifier": ""
        },
        "buyerIdentifiers": [
          {
            "buyerIdentifier": "1007.909.0001"
          }
        ],
        "deliveryDetails": {
          "street": "Οδός Φορέα 1",
          "city": "Αθήνα",
          "postalCode": "10431"
        }
      }
    }
  ]
}