How can I notate on check stub when a vendors credit has been applied to an invoice payment?

How can I notate on check stub when a vendors credit has been applied to an invoice payment?

I'm looking for a way of printing vendor credit memo use on a check stub when its been applied to other invoices.  To let my vendors know I'm using credit memo XYZ in the amount of $xx.xx.  Currently I am having to handwrite it on the stub to show my vendor I am using it.  This seems clumsy and unprofessional.