This aspect even talks more of the game providers and not the casinos holders, because how do they know if it has been rigged right from time or not, another thing also is what they expect from each everyone of us is not to play and always win, but they are also reminding us for a responsible gambling and to do as according to their what we on know, in every game, there's always an house edge benefit.
If the gambler wants to know the protocols when it comes to third party providers, you need to check it in the terms and conditions of the casino. In stake, they have Providers section as well as other conditions that you may want to look at pertaining to their third party providers.
So you know the extent of the responsibility of the casino when something goes wrong with one of their providers.