Prepaid Invoices

When Invoices are Prepaid, specific fields are used in KSeF. Overview:

Billit Field (header)	Billit Field Type	KSeF Field	Content Description	Mandatory
Paid	Boolean	Platnosc/Zaplacono	Prepaid flag
PaidDate	Date	Platnosc/DataZaplaty	Date of Payment	Yes, if Paid is set to true

{
    "OrderNumber": "10999999",
    "OrderDate": "2026-04-29",
    "ExpiryDate": "2026-04-29",
    "OrderType": "Invoice",
    "Paid": true,  
    "PaidDate": "2026-04-29",
    "OrderDirection": "Income",
}

<Platnosc>
      <Zaplacono>1</Zaplacono>
      <DataZaplaty>2026-04-29</DataZaplaty>
      <TerminPlatnosci>
        <Termin>2026-04-29</Termin>
      </TerminPlatnosci>
      <RachunekBankowy>
        <NrRB>PL04105015751000009999999999</NrRB>
        <SWIFT>INGBPLPW</SWIFT>
	    </RachunekBankowy>
</Platnosc>