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.
Business Insider obtained a PDF guide that is sold online for just £2.59.
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.
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.
It details how scammers operate fake dating site profiles in order to con men out of money.
The guide isn't available for free, in fact, it was being sold for Bitcoins on a deep web marketplace.
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.