Void an invoice that has a payment against it.
Invoices can only be voided if the Balance Due equals the Invoice Total, that is, no payments have been applied to the invoice, or payments have been reversed.
Move the payment to the Customer Prepayment account:
Go to Commands > Adjust Receivables.
Enter a Credit Amount that will bring the balance due back up to total amount of the invoice. This will be a negative number.
Enter Account 2600, Customer Prepayments
Apply the minus amount to the invoice to be voided.
Click OK, and confirm that the Balance Due on the invoice now equals the Total Amount on the invoice.
The invoice can now be voided, as it is showing no payments.
Commands > Void/Delete Invoice (You will be prompted to reinstate the order)
The funds previously received are now in the customer prepayment file, and can be applied to a different invoice.
This technique should NOT be used if you are going to refund the customer’s payment.