10 dimes, 100 dimes, $10.43, it doesn't matter to me. Maybe it's the way I was raised, DannyMay, but I would tell them EVERY time. That money is just not mine to do with whatever I please. It
BELONGS to someone else and if mistakingly given to me, to keep is the same as stealing, which I, as many others here, I believe, do not do.
Good luck for the rest of time.