Ok, I got duped by some guys selling speakers out of a van in New York. After some reading I now know it's called the "white van speakers" scam. I had paid them with some checks that were intended for me but they were made out to cash. The con artist who cashed my check put it directly into his account. This happened on 7/14/08. My questions are, is it possible or worth it to request the person who wrote the check to stop the payment for those check? Can the check be considered lost or stolen? Or is there some other way I should try to reclaim that cash? I want to involve the check writers as little as possible.