How old do you have to be to legally play games at River Casino Belle? Casino play is available at River Casino Belle only to persons older than 18 years of age, or who are the legal age of majority in their individual jurisdiction, whichever is the greater. Minors may not, under any circumstances, play online casino games at River Casino Belle. May I register a credit card with River Casino Belle that is not in my name? Our preferred e-cash merchant does not allow players to register credit cards that they are not signatories of. This is primarily for the Player’s own safety. Should you wish to register your spouse's credit card, we suggest that you contact the e-cash merchant directly. If another person would like to play at River Casino Belle via your PC, we strongly recommend that they open their own Real Account.