On Fact, it is possible to create a document without an invoice.

Create a credit note without an invoice

from document tab :

• Press  button and select credit note
• fill in the information required for creation and save
• a credit note in "Draft" status is created 
  • add items to the document, the total amount of the document must be negative
• produce the credit note by clicking on the "Produce" button
  
• validate the credit note definitively. The credit note is given its definitive number
• the following question appears, allowing you to generate a refund-type payment or not 
  • if just approve only: the credit note is validated but the refund is not created; the credit note will have to be settled later, and the document status remains "to be settled".
  • if Yes to create: the credit note is validated and the refund is immediately created, the document status changes to "paid".

Create a refund

To do this, simply click on the payment card and set the payment amount.