The biggest question that arises in the minds of people is what are the casino bonus codes. Well! The casino bonus codes are the unique codes consisting of alphabets and numerals arranged in capital and small letters together. These codes are used to claim the special bonus. Luckily, the casino bonus codes are not kept secret from the players. You can find these codes easily on the promotional page or can also be sent to your mail (as a special offer) by an online casino.