If you move, would UPS catch that and automatically turn it off?
So, when you move, you don't really have to deactivate it so long as you don't send any more packages to that address with your name.
This also means in the case you move and the next resident has the same last name as you, you'll get their package notifications (and can redirect their packages). Presumably the next resident would have to call UPS support to figure this out, but the danger is it would not be obvious someone else has control until they use it, or you attempt to sign up yourself.
"There are some common reasons why you’re currently unable to enroll in UPS My Choice, including:"
"You recently moved to a new home. There may be little or no public record information about your move. Unfortunately, until updated information about your move becomes part of the public record through mortgages, deeds, utility bills, etc., you won't be able to enroll."
It does sound like they do more verification, but it's not clear if they check this regularly to deactivate accounts.
It also makes me wonder if they verify by the name the shipment is going to (matching last name). I've never had something shipped to my house that didn't have my last name on it so I'm not sure.
[1] https://www.ups.com/us/en/help-center/tracking-support/valid...