Assign partial or advance invoices to a final invoice (standard or collective invoice) after the event in order to deduct any payment already received from the invoice total.

1. Be sure to record the payment before assigning the advance invoice to a final invoice (Record incoming payments.
2. Right-click on the final invoice and select  Assign open advance invoice.
3. If there are several open advance invoices, they must all be assigned to a final invoice together.
4. The advance invoice is assigned to the final invoice and moved to that folder. Payments already received are moved to the payment list of the final invoice.
5. Unlink faulty assignments by right-clicking on the advance invoice and selecting  Release advance invoice.