How to discover more people living in unit

[Sergio Aguinaga]

Hello. If the contract has a max of 2 people per bedroom, and home has 3 rooms, that means that there’s a maximum total of 6 people living in the home . Assuming there are 6 people in the lease agreement already (maxed out), how do we know whether more people are secretly living there if they never notify the landlord and every time the landlord is scheduled to pay a visit, they can either tell that person to leave for the day or they can lie about it and say he’s a guest. So what’s the technique used for discovering there’s a secret extra tenant living there?