now that person is asking you to send a check to a different name in the same location. It SHOULD set off warning bells that this person is very likely a scammer.
You're right. There is no simple way to verify that information. People can put whatever they want. But what person in their right mind is going to buy something from someone who won't put their correct information in an ad?
The classified rules are to cut down on scammers and help save some of the not so bright or not so savvy users.