We have several systems in place for catching fraudsters. For example, we put all new members on a watchlist and check their posts and outgoing messages. We run fraud checks on all credit card payments. We search for inconsistencies in member data, e.g. the member’s IP address does not match the location in their profile. And we send out follow-up emails to members asking them to report suspicious behavior. But none of these methods is 100% reliable. And you should always exercise caution when dealing with people you don’t know.