We use a supplier (a delivery company) that have issued a bonus credit to our account for using them so many times over a period of time. The bonus credit is not withdraw able and can only be used to pay for more services.
We now have VAT invoice from them for the full amount of the latest purchase. However, this was fully paid by the bonus credit so there is payment to tag to it as there would be normally.
Is there a correct way to enter this sort of thing in Quick File? Or should the invoice not be entered at all?