Dear

This to acknowledge the receipt of your check for your
pending order.  Thank you very much.

Unfortunately, this check is not drawn in accordance with
our contractual terms for payment and we are, therefore,
returning it to you.

Would you please authorize the issuance of a replacement
check in accordance with the provisions for payment?

We are most anxious to deliver your  [specify]  and will
be looking forward to hearing from you in the near future.