Casinos sometimes use bonus codes to activate a bonus. The bonus code is usually a combination of letters and numbers related to the bonus. For instance, an online casino offering a 200% match bonus could have a bonus code of MATCH200. Players will need to input the bonus code in the designated areas during registration to qualify for the bonus. If you fail to input this code, it is an indication that you don't want the bonus offer. Bonus codes are usually found on the casino's promotions page or sent via newsletters, so you may want to keep an eye out for these. But if you want to save yourself the stress of searching for the best bonus codes, you can check out the list put together by the experts at Eireonlinecasino. We regularly update bonus codes and put only those from leading casinos. Simply choose one, head to the associated casino and input the code.