Why do I need to fill-in a W9?

This gives us the required information to create and send your 1099 Tax Form at the end of the year

We require a completed W9 if you have earned $600 or more in winnings on ParlayPlay and would like to withdraw. All users who have won more than $600 in winnings over the previous calendar year can expect to receive a 1099 Tax Form from our finance team at the end of the year.