Credit Note PA

Needed : Credit Note with reference to a previous Invoice

Description	Validation Rule
When document type is credit note	Reference to Invoice number must be included. The invoice must exist in Billit. This allows to include the date of the original invoice, which is mandatory in Billit.
Duplicate Invoice Numbers	Duplicate Invoice Numbers are not allowed. Error message will be returned by PPF and displayed in Billit.

Other remarks:

The linked invoice must exist in Billit, as Billit will lookup the date of the original invoice
Other scenario : Linking a credit note to multiple related invoices :
- This is a possible scenario in France.
- Currently not yet supported by Billit.

Linked invoice not in Billit

Standard approach is that linked invoice must be in Billit.

During transition phase, no invoice might exist in Billit.

Options:

First option:
- Step 1 : create Invoice in Billit with the correct invoice date, do not send it.
- Step 2 : create credit note with link to the invoice. Billit lookup the date of the original invoice..
Alternative solution : include the date of the linked invoice in the API content via custom field. The following Fields are used :
- The standard field "AboutInvoiceNumber" is still used.
- Custom Field : AboutInvoiceDate
- Example below with some relevant elements of the API body

{
    "OrderNumber": "000999CN",
	"OrderType": "CreditNote",
    "BusinessProcessType": "B1",
    "OrderDirection": "Income",
	"OrderDate": "2026-11-02T00:00:00",
    "ExpiryDate": "2026-12-24T00:00:00",
	"AboutInvoiceNumber": "260000038999",  //This is the number of linked invoice
	"CustomFields": {
    "AboutInvoiceDate": "2026-10-26",  //This is the date of the linked Invoice
    },
	...... 
	}

Credit Note without reference to an invoice number

We propose the following method via API:

Per customer where this applies, create an Invoice in Billit, in order to allow to link to the credit note :
- e.g. Invoice number 000000000 or 999999999 (one number per customer)
- set invoice date e.g. beginning of the year or give it a start date e.g. 01/09/2026
for all the Credit Notes of this type:
- AboutInvoiceNumber refers to the special invoice number and the date
- Text field in note : explains it is a CreditNote without reference to an invoice, with the info about the reason for the creditnote.

Currently not supported at Billit :

CreditNoteTypeCode 262 allowing not to mention a link to an Invoice Number
Reason : This requires the flow 1 e-reporting at detail line level. This is not yet supported by Billit. Detail line e-reporting for flow 1 becomes mandatory on 01/09/2026.

Example of API content for a Credit Note

{
    "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 : 1) mandatory in France and 2) 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"
        }
    ]
}