Dear ______________

This to acknowledge the receipt of your check for the 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.