The rules regarding a Draw for Ultimate Fighting are the same as for Boxing:

 

If the wagering offer on a match includes the draw as a third option and the match ends in a draw, wagers on the draw will be paid, while wagers on both fighters will be lost. If the wagering offer includes only the two fighters, with the draw either not offered or offered as a separate proposition, and the match ends in a draw, wagers on either fighter will be refunded.