https://cygwin.com/pipermail/cygwin-talk/2006q1/001943.html
Fwd: Undelivered Mail Returned to Sender
undelivered mailfwdreturnedsender
https://www.westernjournal.com/ap-dozens-undelivered-mail-ballots-found-sitting-swing-state-post-office/
Dozens of Undelivered Mail-In Ballots Found Sitting in Swing State Post Office
Oct 31, 2020 - Officials are investigating after four dozen undelivered mail-in ballots were found in a Florida post office.
mail in ballots
https://www.postnl.nl/en/customer-service/undelivered-parcel/post-without-track-or-trace/
Undelivered mail without track & trace | PostNL
Are you expecting a letter, card, newspaper, magazine or other mail and has it not yet been delivered? The FAQ's can be found here.
undelivered mailtrack tracewithoutpostnl
https://www.uspto.gov/learning-and-resources/ip-policy/mail-registered-practitioners-returned-oed-director-undelivered
Mail to Registered Practitioners Returned to OED Director Undelivered | USPTO
On June 10-11, 2009, the Office of Enrollment and Discipline (OED) mailed login and password information to each registered practitioner to the last address of...
registered practitionersmailreturnedoeddirector
https://www.fox6now.com/news/pressured-postal-worker-accused-of-putting-undelivered-mail-in-storage-unit
'Pressured' postal worker accused of putting undelivered mail in storage unit | FOX6 Milwaukee