What right do you have to ask for "documents" what like my ID? Are you insane. People's privacy is worth much more then $15 and it's not even a garanteed $15 it's a maybe. Infact let me work it out. If house edge is 1%  and you need $575 that is 575/15=39 not 35 so you can't even count.

50% - 39=11%

Your chance to take away $15 is 11%