Casino entree cambodia

What are the entree rules at the casinos in cambodia. Do we have to show any form of id or only passport or nothing? By example what about the border casinos with thailand, compared to the border with vietnam?

Thanks for the update,

Stu

At the border with Thailand, Poipet, a foreigner is never questioned etc.. A friend did have his Thai wife with him and she was asked for ID. She also was young so perhaps more about age than nationality. In Phnom Penh a lot of Cambodian players inside, stacked in fact at the baccarat table and all over the place. They play over the top of each other, don't know how they keep track of the bets and order but seem to. I know nothing about the Vietnam borders, regrets.