Notice of Inadvertently Shipping Goods In Excess of Order
Please accept our apology for inadvertently shipping merchandise in excess of your purchase order.
We have made a proper adjustment in your account to reflect this error and have arranged for [delivery service] to pick up the excess merchandise on [date].
We are sorry for the inconvenience this has caused you and are most appreciative of your cooperation and understanding in this matter.
Thank you for your recent order.