“He said you had to pay a fee to get the money? That’s the oldest trick in the book!” 「お金を受けとるのにお金を払いなさいと言った?そんなの詐欺だとバレバレだよ!」


“The oldest trick in the book” is a strategy to deceive someone, that is well-known and should be easy to spot. This phrase is often used to tell someone we’ve noticed their trick and are not going to fall for it, or to tell someone they shouldn’t have fallen for a trick.