Defer Revenue for Credit Memo when it is not applied against an invoice

Hi,

Product: Oracle EBS version 12.1.3.

We are having revenue contingencies (Transaction Type: Invoice, Customer: XXX) setup for a customer's invoice to defer the revenue and recognize at a certain event. We want the same set of revenue contingencies to defer the revenue on the Credit Memo and recognize at a certain event, similar to the invoice of this customer. This Credit Memo will not be applied against any invoice and will stand on it's own. Note that this Credit Memo will be generated as a part of AutoInvoice program.

I tried adding the criteria for Credit Memo transaction type on the revenue contingency's assignment rules paramters, but it doesn't show any credit type Transaction Types in the list.