It's a very genuine doubt that hits every player's mind. Online slots are supposed to work as per RNG (Random Number Generator). This system makes it fair for the slots to come up with a random slot screen. The online casinos have certifications from world renowned gambling auditors which make sure that they work with utmost fairness and compliance. To ensure a fair play, Gaming Laboratories International (GLI), eCommerce Online Gaming Regulation and Assurance (eCOGRA) are some of the names that a player should look for while choosing an online casino.