Dear sirs,

　　We have been doing business together for a long time and we value our relationship.But recently,we have not been able to provide the kind of service we both want.

　　The problem is that your purchasing department is changing orders after they have been placed.This has led to confusion and frustration for both of our companies.In several instances,you have returned goods that were originally ordered.

　　To solve the problem,I propose that on receipt of an order,our sales staff contact you to verify it.If you decide on any changes,we will amend the order and fax you a copy so that you can check it.

　　I trust that this system will cut down on delays and errors,and allow our operations to run smoothly.?　　

　　Yours faithfully,

　　James Brown

　　Manger