Need to issue a credit card receipt without processing the card through Sage

Previously, I had been using a different provider to process credit cards. More recently, I switched to processing cards through Sage, which is working fine. Problem is, I still need to enter a couple of older Mastercard payments that were made before I switched to Sage CC processing.

When I try to issue a receipt in Sage (Paid by Mastercard), it tries to force me through the payment process, telling me that it needs an authorization code and can't go any further. Is there any way I can just process a receipt, showing as paid by Mastercard?