Lets assume that a casino is having a very good promotion. Something like a 2:1 blackjack promotion or a promotion where the player has a 10% advantage. Lets assume the promotion is so good that there is no need to vary your bet. The plan is just to flat bet the table max. However, to play the promotion you need a players card. Lets also assume you have never been at this casino before so you go get a players card. However, you are listed in a national data base. Will the casino check all players cards in the promotion against the data base?

Once you start playing the promotion there will be no suspicion because you won't be varying your bets. Do you have anything to worry about?