I was issued a credit memo in 2015 for some merchandise that was returned by our company to the vendor.  To date, we had not used the credit memo.  The vendor has closed its operation in our community so it issued a cheque for the balance.  When I originally entered the item, I entered it as a credit memo with a negative (-48.93) because the plan was to apply it to a future invoice.  Since that didn't happen and it is in a previous fiscal year, how do I apply the refund cheque?

Originally transaction was:

Sept 29, 2015

Debit                           Credit

2100 A/P                        48.93

5200 purchases                                                48.93

Thank you.