Dear :

We have been very satisfied with the quality of your products and the promptness of delivery and we hope to extend our business with your for another year.

However, before making a final selection of our suppliers, we hope you would reconsider your terms of payment. When we were placing our first order with you, you promised that you would offer us more favorable payment terms once a trading relationship had been established. Now that we have dealt with you on a cash against documents basis for over a year, we would like to change to payment by -day bill of exchange, documents against acceptance. We will be glad to supply references if requested.

Would you let us know as soon as possible whether you agree to the terms we suggest?

Yours sincerely,

[name]

[title]