API Documentation
API Documentation

Company has no VAT number

Company not VAT registered

No VAT Number, but other Identifier

When a customer is not VAT registered, and no VAT is mentioned in the API content when posting an invoice, then Billit will overwrite an existing customer with VAT number.

A solution to fix this is to add an additional identifier, e.g.

  • company number (example below)
  • GLN number (explained on different info page)

Optionally, in the customer segment the flag "TaxLiable" can be set to false. This has no direct impact on the output today, but displays the status correctly in the customer data in Billit.

{
 "OrderType": "Invoice",
 "OrderDirection": "Income",
 "OrderNumber": "QS-005457",
 "OrderDate": "2025-12-01",
 "ExpiryDate": "2025-12-30",
  "Customer": {
   "Name": "Politie XYZ",
   "PartyType": "Customer",
   "Identifiers": [
        {
        "IdentifierType": "CBE",
        "Identifier": "0793249999"  //This information is needed to make sure that a unique customer is created in Billit 
        }
    ],
   "Addresses": [
        {
        "AddressType": "InvoiceAddress",
        "Name": "Politie XYZ",
        "Street": "Oktrooiplein",
        "StreetNumber": "1a",
        "City": "Ghent",
        "Box": "301",
        "CountryCode": "BE"
        },
        {
        "AddressType": "DeliveryAddress", 
        "Name": "Politie XYZ",
        "Street": "Oktrooiplein",
        "StreetNumber": "1b",
        "City": "Ghent",
        "Zipcode" : "9001",
        "Box": "b",
        "CountryCode": "BE"
        }
   ]
   },
 "OrderLines": [
  {
   "Quantity": 1,
   "UnitPriceExcl": 0.1,
   "Description": "Box of cookies",
   "VATPercentage": 6
   },
 ]
}
{
 "OrderType": "Invoice",
 "OrderDirection": "Income",
 "OrderNumber": "QS-005457",
 "OrderDate": "2025-12-01",
 "ExpiryDate": "2025-12-30",
  "Customer": {
   "Name": "Politie XYZ",
   "TaxLiable": false,
   "PartyType": "Customer",
   "Identifiers": [
        {
        "IdentifierType": "CBE",
        "Identifier": "0793249999"  //This information is needed to make sure that a unique customer is created in Billit 
        }
    ],
   "Addresses": [
        {
        "AddressType": "InvoiceAddress",
        "Name": "Politie XYZ",
        "Street": "Oktrooiplein",
        "StreetNumber": "1a",
        "City": "Ghent",
        "Box": "301",
        "CountryCode": "BE"
        },
        {
        "AddressType": "DeliveryAddress", 
        "Name": "Politie XYZ",
        "Street": "Oktrooiplein",
        "StreetNumber": "1b",
        "City": "Ghent",
        "Zipcode" : "9001",
        "Box": "b",
        "CountryCode": "BE"
        }
   ]
   },
 "OrderLines": [
  {
   "Quantity": 1,
   "UnitPriceExcl": 0.1,
   "Description": "Box of cookies",
   "VATPercentage": 6
   },
 ]
}

Result is a unique customer in Billit. When flag "TaxLiable" is set to false, then the field "Subject to VAT" will not be selected.

Updated about 4 hours ago

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