R.I. Gen. Laws § 11-19-17: Invalidity of instruments won in bets on races or fights.

All bonds, notes, judgments, mortgages, deeds or other securities, as well as promises, given or made for money, lands, houses, or other property, or article or piece of property, real, personal, or mixed, won at any game, or by betting at any race or fight, or for the repayment of money knowingly lent for such gaming or betting, shall be utterly void.