Write off invoice
A write-off is the unpaid part of the invoice that you are not expecting to be paid in the future, so you may want to mark the invoice as fully paid by adding a write-off amount.
To do so, press "Actions" and then "Write off":
For instance, you invoiced the client for 2420 EUR but got 2400 EUR because of the bank charges, and for some reason, you are not going to ask the client to pay 20 EUR difference.
So, enter the write-off amount and press "Save" to confirm it: