As far as tips go, I understand they are against Company policy. I believe they kind of turn a blind eye to it unless it leads to a complication. Case in point, several years ago I represented a city driver who took a $20 tip for bringing a piece into a house, several days later the lady called to have it picked back up for some reason, when she was told to box it and get it ready she said she "paid" the driver to bring it in to her house and unbox it. He was terminated for "failure to turn in inside delivery charges". We got him back but not after 5 or 6 weeks off the job. That $20 cost him thousands...
Many moons ago when I worked the city I had a regular who always offered me a tip, I always told him I can't accept it, but if I would happen to "find" it that would be great, he would drop it at my feet and I would "find" it....