About Underpayments
Occasionally, a customer may send you a check that does not quite cover the total invoice amount. However, if the underpayment is a marginal amount and you don't want to bill the customer again, you can write off this marginal amount as a discount.
For example, suppose the customer's invoice totals $53.10, but you receive a check for $53.00. When you post the customer's payment, you can enter $53.10 as the total payment amount, and enter .10 as a discount. When you post the payment, $53.10 will be posted to the cash account, while the .10 will be posted to the discount account. Note that the amount due changes to Ø.
Note: You can also adjust the invoice using the Adjust Line Item dialog box. This dialog box lets the change the amount of the posting, the discount amount, and the reverse general ledger account number. For details, see Adjusting Payment Detail.