Unapplied Cash is listed as an "invoice type" that works similarly to a credit memo, that can be used as payment for other invoices.
Unlike credit memos, Unapplied Cash is just a cash value that displays in the AR Post Payments as a Balance Amount that can be applied to a payment but is not associated to any transaction or specified employee and therefore will not display an “invoice” report [but the balance is displayed on the Monthly Statement]. Use the option of Credit Memo if it is required on an invoice.
When a user enters a payment amount in excess of the amount due, a message appears:
“The applied amount is higher than the invoice balance amount, would you like to create an Unapplied Cash?”
Unapplied Cash invoices appear in the Unapplied Cash grid, and also as a new invoice row.
An Unapplied Cash invoice can also be created in the Create New Invoice wizard.
Once an Unapplied Cash invoice exists in the system, it can be used as payment for invoices to the relevant customer. For details, see Apply Credit Memos or Unapplied Cash.