Postal Act Article 22

All mail items shall be delivered to the delivery address written on their cover, save for redirected items or in a case when delivery to a location is difficult or impossible and the mail is routinely delivered to another address (as specified under Article 24 or 48 hereof).Where a mail item is not deliverable, it should be returned to its sender. When returning it to the sender is not feasible, Chunghwa Post should post it for claim. Chunghwa Post may dispose of undeliverable items of mail after they have been posted for claim for a considerable length of time.