Some casinos may have had issues in the past, but they have since made changes to their policies to make sure that their customers are protected. Look for statements from the casino that acknowledge previous issues and explain how they addressed it. I am much more willing to trust a casino that can recognize that they made mistakes than one that pretends everything was fine. You can also search for online casino blacklists, like the one that slot168. Blacklists will tell you about online casinos that have several proven instances of scamming their customers. We need to have proof of multiple problems before we can add a casino to our blacklist, so it is not all-inclusive. There might be some rogue casinos that are not on any blacklists because their issue has not been proven yet, but you definitely want to avoid any casino that is on a blacklist.