Yes I got a free TEFL once, part of the agreement with a school that they give you one without you actually having to do anything for it. They churn those certificates out like sausages-they are supposed to be legal, but if you compare your certificate with one presented to another foreign teacher in the same school it will probably have the same number on it(they use the same few numbers)- It's about as authentic as a Khaosan Road one, and you don't get to flirt with a lady-boy.