Locals are banned from gambling due to moral reasons. Simply, the Princely Family did not want the Monégasque locals to gamble away their money. It is important to refer back to the fact that Monaco is an independent state, therefore Monaco gambling laws do not have to conform to the ones in France.

The prohibition of citizens of Monaco (Monégasques) from gambling at the Monte Carlo Casino is a long-standing law rooted in social protection and moral history. Established in the mid-19th century by Prince Charles III and further enforced by Princess Caroline, the rule was designed to prevent the local population from falling into financial ruin through gambling. The princely family wanted to ensure that the casino served as a source of revenue from wealthy foreigners to support the principality's economy, rather than a place where the local labor force or citizens could lose their savings. To this day, the law is strictly enforced; upon entering the gaming rooms, guests must present a passport or national ID. If your ID shows you are a Monégasque citizen or a resident of the principality, you are legally denied entry to the gambling tables. Interestingly, while they cannot gamble, citizens are allowed to work in the administrative offices of the casino's parent company, the Société des Bains de Mer (SBM). This unique law ensures that Monaco maintains its image as a sophisticated global playground for the elite while protecting its own small population from the risks of addiction.