Delivery people who visit elderly people’s houses on a daily basis often notice unusual situations.

I didn't realize people still have newspapers delivered ! As for the mail, I guess that would depend on the "mailbox". Ours is outside and could "overflow" but I believe some houses have mail that goes through the front door onto the floor... Would take some time before anyone realizes how much has accumulated... I still think it's an excellent idea which could save elderly people from dying alone. On the other hand, if they had family living with them or at least a good "retirement" place to live (NOT one of those places where they abuse the residents and steal from them) that would be even better. Loneliness is never a very good solution.

Just a head's up:

If there is a pile up of mail, newspapers, they aren't answering their door, they're already dead.

You want to get to them BEFORE that happens.