the most fun ones are dmv and university because i am legally liable for those changes :)

nostr:npub128mjd2q6fy2eh6hvgxq46s9czq6yaehk6z73dgcgq7dtmjhgmnpsvyfzga https://moversguide.usps.com/mgo/

get a 1 year forward and let the postal service do all the work. bonus: it doesn't work on bulk presorted.