Regret Letter for Over shipment
With due respect to state that, kindly accept our apology intended for having shipped commodities (product name and amount) more than your purchase order.
We’ve got made an adjustment inside your account to reflect this error and possess arranged for (delivery service) to get the excess commodities (product name and amount) upon (date….).
We are sorry for that inconvenience this has caused you and therefore are most appreciative of ones cooperation and understanding in this matter. Thank you for your recent order.
Designation with signature….