Last week I was cutting grass as usual, when the 1st client overpayed by 5 dollars, then the next one too! the last client overpayed 10 dollars. I advised all of them that they were overpaying just incase they didnt know they were...or they were testing me. All 3 clients knew they were overpaying....they all said the same thing, "ahhh dont worry about it its ok". I'm sure this has happened to some of you guys, what do you do?