Can I Undo Matched Credits and Invoices?

I have matched an Invoice and Credit note and now need to undo this.  Can I?

Solution

While there is a warning as you do the matching of these transactions.

It is possible that they may show in the Delete Customer payment screen (Admin / Deleting / Delete Customer Payment)

This will depend on the date of the transaction and the Why can I not find a payment to be deleted.