I agree with the verifying orders statement - it's better to weed them out before they get in. If you have a firm account verification process (calling the person who placed the order, trying the email address they used to be sure it is real, or even asking them to answer a verification fax), it does help. They always find a way through, sadly, but at least you don't make it easy for them.

My question is always: Who keeps buying stuff from SPAM emails??? I assume if no one responded to their offers, it wouldn't be worth it to continue. So who are these consumers who don't know better than to buy things off SPAM mail?