On__________, 20 _, we shipped the following goods to you pursuant to your purchase order #______________, dated __________, 20 _:
(Describe goods)
On _________, 20 _, we received notice that you had rejected delivery of these goods without satisfactory explanation. We, therefore, request that you provide us with an adequate explanation for this rejection. Unless we are provided with such explanation within 10 days, we will take legal action to obtain payment for these goods.
Thank you for your immediate attention to this matter.