Well, I believe my recommendation is to give it a shot or to contact customer service.
I would refrain giving it a try. If he do something like what he's planning and the casino finds it out then there's more trouble to his money. It's better for him to talk seriously with the customer service and be outright on what has happened.
Things can be done peacefully if it's being made through talks and I think that the casino will spare him as it is his fund and didn't came from nowhere. There's a chance that he'll be given consideration.
The chance of getting the funds back with sincere talks with the customer rep is better if the site is a known reputable casino here.
But if not, high likely that the site will freeze his funds because he is using the site from prohibited countries.
The OP should also check the terms of the site regarding the use of VPN on the casino.
If the site is allowing VPN, then he has good hope to get the funds back even using his own credentials.
Because the problem with asking from a friend is that, it will suddenly give a different IP, which is very different from his previous recorded IPs.
Which will give the site more suspicion about his account. So for me, it is better to talk with the site about the real status of his account.
Haven't logged-in since last week, will read through all the posts. Thanks for all the replies and advice.
I believe the site to be one of the largest and for sure reputable on this site. I've always wanted to place sports bets but it is illegal in my state. Almost every website recommended this site for US betters while using VPN. And in fact I logged in using different countries for almost two months, and they never gave me any issues, so I thought it was kind of a "look the other" way type of thing.
I did talk to customer service and they said there is absolutely nothing they can do until I submit KYC> They said no one has the ability to unlock my account except the security team, and they cannot talk directly with the customer.
I kind of made peace with the winnings stuck in there, and no plan at the moment to try and retrieve it via a mule.