Or... if you're selling something and you don't notice the items they
have, would you want them to come back and correct the mistake?

Puckdropper
--
This brings up some interesting situtions. I try to check totals at the
register but don't always do so and find mistakes at a later time. When I
go back to correct the mistake I am often told that if I didn't catch it at
the register at the time of purchase it was to late to do anything about it.
Since the majority of these problems are in my favor not the stores I have
always found it an odd policy. I find most of the cashiers who follow this
policy are young highschool aged types and don't seem interested in my
business anyway. I have never had a problem at a store that deals with the
building trades correcting a problem even after a few days delay no matter
whose favor it is in. Chain resturants seem to have the biggest problem
with correcting this type of problem in my area.