First of all: each coupon code has a specific number or a combination of letters and numbers. Example 'coupon code HOT32'. This special code, written in CAPS, is given by the online casino itself. So, each promo code belongs to a specific mobile casino and you have to use this code in order to receive the free offer belonging to it. The present promo code appears immediate on the homepage of the casino. Sometimes you have to make a minimum deposit of $10, or more. And there can be a wagering requirement involved. Wagering from 30x to 100x bonus and deposit is no exception. So read the bonus details. Is the promo code valid for all players? Or just for new players, which is mostly the case. Is there an expiration date? A deadline on which the coupon code is not valid anymore? For example: this coupon code is valid until January x.
Finally, there may be limitations regarding the cash out, i.e. $100 maximum cashout. Other benefits are free casino chips, promo code for free money, nodeposit coupon and free casino credits.