My office is on somewhat of a combo route, lots of small office buildings with 10 to 30 suites in most buildings, with some single business and a few retail buildings. The carrier drives to the different buildings, but then walks the buildings to serve the individual suites. She's 50'ish, friendly, smart and a nice lady overall, and over my 20 years, had been by far the best carrier we've had. But around Feb by my records things started going down. I really don't want to get her in trouble, that's why I was looking for different options.
Years ago we had an older guy who smelled of cheap booze constantly; He was just riding it out waiting to retire. After he made his rounds we tenants were often known to exchange our mail to set things straight.