When mail sent from the U.S. is unable to reach its destination, the United States Postal Service, or USPS, will mark it as "undelivered mail returned to sender." There are exceptions to this, such as when the mail is a normal letter, or when a customs department within the country the mail is sent to requests abandonment.Continue Reading
It is sometimes the case that postal forces cannot deliver mail to particular locations. In the case of a normal letter, it is not returned to the sender unless the sender requests this. In addition, some customs departments may ask that the mail is abandoned when it cannot reach its destination.
Circumstances in which postal services cannot deliver mail include:
If the sender wishes to resend the mail, they must pay for postage again. In some cases, the sender may incur charges for the mail's return. If the recipient has moved to another U.S. address, the sender can resend the mail after paying a forwarding charge.Learn more about Postal Services