If the sportsbook has been approved by a state licensing board, then honestly it’s very unlikely that it will have anything illegal. You can deposit money safely knowing that no one is breaking any laws. Still, there are some red flags to look out for. Bitcoin and other cryptocurrencies are illegal payments for US sportsbooks, and sportsbooks should not be offering any loans for gambling money. If you see any of these in a sportsbook, stay as far away as possible.