You can use the AP from AR Clearing on the Period End menu in AP, or you can just do a zero dollar payment on the credit memo with an offsetting line to some GL account, then create an invoice in AP using the same GL account.

You can use the AP from AR Clearing on the Period End menu in AP, or you can just do a zero dollar payment on the credit memo with an offsetting line to some GL account, then create an invoice in AP using the same GL account.