I usually don't read comments so I will believe you. I agree, welfare checks in the US don't work and are usually more harmful than not. There should be another way to check on someone. Some kind of social worker or somesuch who does this instead of police with guns. But I do know of 2 people who were found dead in their homes when they didn't come to work. (and others who when called by their work had just woken up bc their alarm clock batteries had died) If this person isn't returning phone calls, even to simply say "I am fine, stop calling" then the only thing I can think of is finding someone who can go to their house to check. (maybe not a supervisor, but just a person in the company? HR? I dunno.)