They do that so that legally your wife can open the advertisement. They don’t and you wanted to be a loser, you could report her for tampering with your mail. I’m not sure what the postal investigator would do. “Knock it off and call a divorce lawyer” might feature somewhere in the possibilities.

Same reason they add “or current residents” as well.

They want it read, they don’t care if it’s you or your wife or the luchador that’s randomly moved in with you.