Writing off an overpayment
If a customer pays you more than the amount required to pay a debt in full, you can mark the invoice as paid in full and write off the overpayment.
- Select Customer > Entry > Cash Receipt.
 - Click OK to open a journal.
 - Select the payment method in the Type field.
 - Follow the instructions for the payment type until you are ready to apply the payment to the overpaid invoice.
 - In the Invoice grid, select the invoice that was overpaid.
 - Click Paid In Full.
 - In the Apply Amt field, specify the amount to be applied to the invoice.
 - Press Tab or Enter.
 - Specify the write-off amounts and accounts.
 - Click OK.
 - Specify a discount amount, if applicable.
 - When you have finished applying the payment, click Save.
 - If the proof amount is zero, click Yes to indicate you are ready to update.
 - If the proof amount is not zero, specify a reference and then click OK.