If an undocumented person wins the prize, can he claim it?

And

Ask someone for help or if they give you but they discount you a lot

Obvio no. Pero puede solicitar a alguien de su confianza que se lo cobre y que le reduzcan impuestos.

They take 30% off if they pay you

Noooo

Yes. they discount 35% all jackpot after 1200 you have to pay with your itin number and identification