All license credentials are always public information and will be displayed on the casino website. Playing in regulated markets such as the UK, Sweden, etc. means that those gambling authorities also regulate the website content, which is an extra layer of safety to the player. If you are playing in a country which is not regulated, look for a stamp of approval from the Malta Gaming Authority (MGA) which regulates .com casinos. A reputable casino will also always advocate that you play in a casino that is publicly audited by a third outside party such as eCOGRA who internationally regulate casinos and make sure they are fair to the player.