Most people create other accounts for bad purposes like collusion, bonus abusing or to not comply with certain restrictions applied on his account, so there is definitely a risk that you won't get paid of you are caught.
It's rare to see someone that creates multiple accounts in one casino for some reasons like forgotten password and email. The most of them have only one reason and that's to abuse the system and the casino if there are some promos conducted. And they're even angry when they're caught because they've got some balance left and they want to cash out but if they're forbidden to do that. That is one of the consequences that they need to accept for doing such actions against the rules.