If a forwarding address is on file, where does the carrier send undeliverable standard mail with an Ancillary Service Endorsement?

When a forwarding address is on file for a piece of undeliverable standard mail that has an Ancillary Service Endorsement, the correct procedure is to send the mail to a designated processing service like CFS (Change-Of-Address Forwarding Service) or PARS (Premium Forwarding Service). These services handle the re-direction of mail to the new address designated by the recipient.

This procedure allows the Postal Service to efficiently process mail and ensure that it reaches its intended recipient at the new address without being returned to the sender. It is essential for maintaining mail flow and customer satisfaction, as it helps avoid delays in receipt for those who have moved and have provided a forwarding address.

Other options would not be suitable in this case: sending mail back to the sender does not utilize the forwarding address, and the local delivery office or the Mail Recovery Center are not typically responsible for processing mail with a forwarding address. This highlights the importance of using specialized services for effectively managing mail redirection when recipients change their addresses.