Dear :

Please refer to the following instruction when you send us your payment:

Our accounts receivable system requires that each customer location be identified by a customer number which can be found on the mailing lable. This number is assigned to identify all invoices sent to the same customer location. You are required to write on all the checks you send to us both the invoice numbers being paid and the customer number. This will permit us to promptly record the receipt of your payment.

Thank you for your coorperation.

Sincerely yours,

[name]

[title]