An email or letter of apology to customers regarding delayed delivery of products. It gives a detailed explanation as to the reasons for the delay and apologies for the delay.
Please accept our profound apologies for the late delivery of [Products] to you.
[The [Products] you ordered [order no.] on [date] are being sent to you right now and should arrive at the delivery location by [date].]
[When we investigated the original shipment, we were surprised that it was sent to the incorrect address. It was purely due to a [our clerical error] / [shipper’s error] / [mix up at our freight company] and we have tried to remediate immediately by sending you another shipment [by air] without waiting for the return of the original shipment.]