This screenshot shows a user of a hacker forum being advised that a quick way to find sets of photos is to automatically download them from Facebook: Even before a scammer messages you, you can spot they're fake by checking their photos.
Performing a Google image search for an account's profile picture will show you where on the internet the image appears — sometimes you'll see it attached to Facebook, Instagram and Twitter accounts with various different names.
Another way to spot whether an account is fake is the selection of photos that it uses.
Adhrann's guide says that scammers should "look on the Internet for a bunch of pics of a cute girl" and select someone who is "not a top model, but a normal sexy girl." To find photos, scammers can buy sets of photographs of young women, often through shady forums frequented by hackers.
They are then instructed to take the information learned, and then create the "perfect woman" for the target.
Dating sites are, thankfully, getting better at spotting who is using their service to send thousands of spam messages.
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.
Business Insider obtained a PDF guide that is sold online for just £2.59.
It details how scammers operate fake dating site profiles in order to con men out of money.
It's not just guns and drugs that are up for sale on deep web sites.