[Date]
[Name],
[Company and Address],
Dear Mr. / Ms. —————— [Name],
I am in receipt of your invoice # ———– [Invoice No.], dated ————- [DD/MM/YYYY].
I believe there has been a slight mistake. Because as per our order no. ———— and shipment of ——————— (products / materials) receipt ————– (no.) which I have been enclosed for you, we ordered and received only ————- (no.) compressors, as opposed to the ——- (wrong no. of invoiced]. [State nature of mistake, citing and enclosing supporting documents, Please check your records and inform me if I am incorrect anywhere.
I request that you send me an updated invoice at your earliest convenience so that we may process your payment.
Sincerely,
[Name & Signature]
