THANK YOU FOR YOUR PROMPT PAYMENT: SERVICE

Dear Felix

We have just received your payment for [SERVICE, our 1997 tax return services].

I would like you to know that I appreciate your history of prompt payment. It is customers like you who enable us, in turn, to offer you competitive prices. {MENTION WHETHER YOU WILL OFFER BONUS, ex. In appreciation, we would like to offer you a 2% discount for all invoices paid within 15 days of the invoice date.} We are pleased to have your business!

Regards
Lydia