When a customer submits a change-of-address order, USPS sends the customer a move validation letter through First-Class Mail and delivers it as addressed.
This letter must be delivered to the address on the mailpiece. If the letter must be returned for non-delivery, the item must show the reason. This information is displayed on the outside of the envelope.
USPS wants managers and supervisors to make sure all validation letters are delivered to the address on these mailpieces. Managers and supervisors should also make sure all mail carriers are aware of the requirements.
Employees who have questions can email Address Management Support.
Source: USPS News Link