Initially, players must locate a trustworthy online casino that provides the promo code as one of its promotional packages. Usually, you can do this by visiting the casino's websiterummy slots real money or by looking for promo codes on different gaming forums and websites. Entering the promo code after creating an account. If you haven't done so already, the next step after finding the code is to register for an account with the online casino. The cashier or promotions section of the casino's website should be accessed by players after they have registered.