It's not just guns and drugs that are up for sale on deep web sites.
Potential scammers are also advised to use virtual private networks and proxy services, both of which can help hide the scammer's real IP address and location in case law enforcement get involved.
The documents are often sold for small amounts of money, but the price barrier, the need to pay with Bitcoin, and the fact that they're only available on the deep web prevents the guides from being circulated widely.
The document, titled Adhrann's Updated Dating Scam 2014, lays out a method for creating fake dating site profiles, ensnaring men in conversation, and then pressuring them to send money.
It's pretty easy to tell: They send the same message over and over, often with the same link.
But there's a type of dating site scam that's far trickier to spot, and the people who operate it claim to be making thousands of dollars every month fooling vulnerable men.