Reversing a Posted Payment

1. Enter a negative A/R payment for the customer with the same check number. You must add a one or zero to the end of the original check number, as the system will see that this check has already been used for this customer.
2. Distribute the negative amount to the invoices that were originally paid. If the original payment was distributed as an open payment to the customer's A/R journal, then distribute the negative amount the same way.
3. Create a zero-amount invoice (for example, 0.00) and post it to the customer's A/R journal.
4. Reapply the open positive payment to the zero-amount invoice.
5. Reapply the open negative payment to the zero-amount invoice.
6. Post the payments to zero them out on the customer's A/R journal.