The other day I was picking up a package and the friendly clerk asked for my name. There's another local woman with the same name as mine, who shops at many of the same stores I do, so to be safe he also asked for my address and birth date.
The computer was slow, and while we were waiting he told me that name confusion had led to some major hassles for him when he was applying for a mortgage. Apparently a man with the same name had a seriously spotty credit record, including defaulting on a liquor license. After many phone calls he convinced the bank that he was not in fact miscreant, and he was eventually able to buy his house.