I am just throwing the law out there. It is illegal to TOUCH the actual mail box. Many postmen will not do anything as long as you are not impeding their jobs by putting fliers on the box as long as you don't put it inside. BUT it is still against the law to put something on the mail box, every mail box is considered federal property. You get a postman pissed off at the world and your flier falls on the ground bc it is in jammed behind the box and the flag. Then he has to get out of the truck and pick it up.... He can report you! I am just passing that on to the new people because it seems stupid but it is the law and people have been fined HEAVILY for it.