Hidden fraud refers to the operators using the network to release false advertising, untrue statements, conceal the truth, or use other improper ways to lure consumers to make improper choices and buy their products or accept services. The basic connotation of implicit fraud is that website merchants lack integrity, attract popularity for profiteering, release super price or false information on the network to lure consumers to buy their products or services, and achieve the purpose of fraud to earn more profits. The implicit fraud of group purchase websites has the characteristics of virtual, concealment, fraud, space and harmfulness.