Most likely by tying a bag with an envelope inside to the handle of the trash can. Or you can just run up to them if they come by at a reasonable time. People a

Most likely by tying a bag with an envelope inside to the handle of the trash can. Or you can just run up to them if they come by at a reasonable time. People also tip postal workers, paper boys, milkmen (which still existed in my youth at least), generally anyone who takes or leaves anything at the house.