VOID Credits?

[lurveparastein]

I completely understand how to apply a credit to an invoice, but one of my employees marked an invoice incorrectly. It became an overpayment, when in reality the customer paid the correct amount. How do I void these credits or get rid of them without the customer paying less on another invoice? This has happened on many customers' invoices and I need to know a way to correct it ASAP.

[Joe Williams]

Enter an invoice to the customer with the same item as used on the Credit Memo for the difference or a journal entry that Debits AR and Credits the same account used on the Credit Memo. Next apply the credit to that transaction.