Specific Content Requirements PA

Business Process Type

For each invoice, an invoice type must be defined on header level. The basic options are :

Type	Not (fully) Paid	Already Paid
Goods Invoice	B1	B2
Service Invoice	S1	S2
Mixed Invoice	M1	M2

See subpage for more information.

Define Customer Identifier

Find the identifiers of the customer. Include them in Billit.

More info : Identifiers PA

Use Correct Tax rates.

More info : https://docs.billit.be/docs/tax-codes-pa-france

Selection of the Invoice Format of the Receiver - Determined by Billit

Sending the invoices to the receiver must be in a format registered by the receiver. Billit will automatically select a format that is registered by the receiver, you do not have to set the format yourself.

Some important validation rules for France

Description	Validation Rule
When document type is credit note	Reference to Invoice number must be included
Duplicate Invoice Numbers	Duplicate Invoice Numbers are not allowed

Example of API content of an Invoice and Credit Note

{
    "OrderNumber": "227010068_Simple2",   //invoice number
    "OrderDate": "2026-06-06",   //invoice date
    "ExpiryDate": "2026-07-04",  //due date
    "OrderType": "Invoice",
    "OrderDirection": "Income", 
    "Reference": "4512345678",  //order number of the supplier
    "PaymentReference": "365878545",  // if a payment reference is required 
    "Comments": "additional info",  // this will go in the note section as additional free text info
    "Currency": "EUR",  //Mandatory
    "DeliveryDate": "2026-06-05",  //Optional
    "BusinessProcessType": "B1",  // See documentation for allowed values
    "Customer": {
        "Nr": "0001001999",  //only if you want to store your number in Billit
        "Name": "FR demo receive",
        "Addresses": [
            {
                "AddressType": "InvoiceAddress",  // this is the billing address
                "Name": "FR demo receive",
                "Street": "place demo receive 987",
                "Zipcode": "75001",
                "City": "PARIS",
                "CountryCode": "FR"  //mandatory
            },
            {
                "AddressType": "DeliveryAddress",  // optional delivery location
                "Name": "FR demo receive",
                "Street": "place demo receive 987",
                "Zipcode": "75001",
                "City": "PARIS",
                "CountryCode": "FR"
            }
        ],
        "Phone": "+335845366999",  //only if you want to include customer contact phone
        "Email": "[email protected]", //only if you want to include customer contact email of for email sending
        "VATNumber": "FR37127399999",  // mandatory if customer has VAT number
        "PartyType": "Customer",
        "VATLiable": true,  // Is by default true when VAT number is communicated
        "Language": "FR",
        "Identifiers": [  // see documentation about identifiers
            {
                "IdentifierType": "SIREN",
                "Identifier": "127362116",
            },
            {
                "IdentifierType": "CTC",
                "Identifier": "127369999_DEMO",
            },
        ],
    },

    "OrderLines": [
        {
            "Quantity": 1.0,
            "UnitPriceExcl": 400.0,
            "Description": "just a single line",
            "VATPercentage": 20.0,
            "Unit": "PCE",
            "DescriptionExtended": "some extended description"
        }
    ],
   
}

{
    "OrderNumber": "227010068_Simple2",   //credit note number
    "OrderDate": "2026-05-06T00:00:00",   
    "ExpiryDate": "2026-06-04T00:00:00",  
    "OrderType": "CreditNote",  // when creditnote
    "AboutInvoiceNumber": "121254587",  //Reference to Invoice number : mandatory in France and Invoice must exist in Billit
    "OrderDirection": "Income",    
    "Reference": "4512345678",  
    "PaymentReference": "365878545",  
    "Comments": "additional info",  
    "Currency": "EUR",  
    "DeliveryDate": "2026-04-27T00:00:00",  
    "Customer": {
        "Nr": "0001001999", 
        "Name": "FR demo receive",
        "Addresses": [
            {
                "AddressType": "InvoiceAddress", 
                "Name": "FR demo receive",
                "Street": "place demo receive 987",
                "Zipcode": "75001",
                "City": "PARIS",
                "CountryCode": "FR" 
            },
            {
                "AddressType": "DeliveryAddress",  
                "Name": "FR demo receive",
                "Street": "place demo receive 987",
                "Zipcode": "75001",
                "City": "PARIS",
                "CountryCode": "FR"
            }
        ],
        "Mobile": "+32475366999",  
        "Email": "[email protected]", 
        "VATNumber": "FR37127399999",  
        "PartyType": "Customer",
        "VATLiable": true,  
        "Language": "FR",
        "Identifiers": [  
            {
                "IdentifierType": "CTC",
                "Identifier": "127369999_DEMO",
            },
            {
                "IdentifierType": "SIREN",
                "Identifier": "127362116",
            }
        ],
    },
    "OrderLines": [  //Credit Note : amounts must be positive
        {
            "Quantity": 1.0,
            "UnitPriceExcl": 400.0,
            "Description": "just a single line",
            "VATPercentage": 20.0,
            "Reference": "915025",  //Supplier Article Number
            "DescriptionExtended": "some extended description"
        }
    ]
}