Provision of Receivable (Temporary Credit)

Hi,

I'm using Quickbooks Desktop.

When one of my customers issues payment they are including a Provision of Receivable (temporary credit memo), they forecast different associated fees due from us, this usually gets cleared in a few days, then I would see a Provision of Receivable reversal on the remittance advice.

The major issue I'm having is that the customer includes the provision of receivable payment with multiple open invoices, so they would deduct these provisions and credit the provisions to specific open invoices, making it impossible to mark these open invoices as paid.

Do I treat the provision as a journal? How do I mark invoices as paid?

Thank you.