https://www.epo.org/de/boards-of-appeal/decisions/t040388ex1
T 0388/04 (Undeliverable mail/PITNEY BOWES) vom 22.03.2006
undeliverable mailpitney bowes038804
https://www.canadapost-postescanada.ca/cpc/en/support/articles/undeliverable-mail/what-happens-to-undeliverable-mail.page
What happens to undeliverable mail | Canada Post
Read about what we do with mail items we consider to be undeliverable.
what happensundeliverable mailcanadapost