“Return to sender” carries very little meaning to the sender:
- Who returned it? The postal service, the intended recipient, or some other person?
- Why was it returned? Was it considered spam, was the address wrong or incomplete, or was there some other reason?
Are there norms, rules or laws associated with what is entered on the item when returning? For example, if marked as “spam”, can I assume that the company will behave, or is it rather like email, where trying to unsubscribe will result in even more spam (since now the address has been verified as active)?