Originally Posted by JSA Matt

Simply changing the first letter in a NATS code to lowercase will result in a sale to the default NATS account

Example: MTE3OjU6NQ to mTE3OjU6NQ (Or another example: MTE3OjU6NQ to MtE3OjU6NQ)

Of course it's not fool proof, but it's one of many possibilities

Originally Posted by Lensman

Affliates can see that. View source on the join page: <input type="hidden" name="nats" value="MTE3OjU6NQ">. Besides, an affiliate can simply pull out his own credit card and see if he gets credit for the join. Check joins may be delayed because of normal time-based fraud delays, but credit cards never are. So there are two ways affiliates can detect that in one minute.