Occasionally a rogue casino will be discovered. There are two ways a casino might misbehave: refusing to pay customers or cheating software.

Cheating software appears to be extremely rare. There are some casinos that have been mathematically proven to cheat, such as Casino Bar (evidence by Michael Shackleford and others). Some players often accuse certain popular software brands of casinos of cheating, for example Boss Media, Cryptologic, and Playtech, but they are likely "finding" patterns that are not actually there, as tests for cheating at these casinos has never turned up positive. This does not mean that all software providers are honest (for example, Elka System/Oyster Gaming software is known to cheat, also confirmed by Michael Shackleford), but the most popular software is more likely than not.

Blacklists

These are rogue casinos to avoid. Different authors have different opinions on which casinos are worth avoiding, so always read the reason that they are on the blacklist and decide for yourself if you want to play there.

• The Wizard of Odds' blacklist
• Casinomeister's list of rogue casinos
• Casino Man's Blacklist
• Online Casino Conditions' Blacklist
• Top Gambler's Casino Blacklist

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