Nowadays, faking oil paintings is one of the most widespread tendencies among art crooks. If you manage to create a believable reproduction of a famous work, you might well sell it for thousands or even millions of dollars. Whether you are a collector, an art adviser, or an art dealer, knowing how to detect art forgery is one of the basic skills you need to acquire. Here is a step-to-step guide on how to spot a liar and save your time and money when working with art.