Ray Wished to Purchase a Motor Vehicle from Rita on Credit,but

True/False

Ray wished to purchase a motor vehicle from Rita on credit,but Ray was unemployed,and Rita was hesitant to sell to him for that reason.Ziggy,who was quite wealthy,said to Rita: "Sell Ray the automobile on credit,and if Ray does not pay you,I will."
-Ziggy's promise would be unenforceable,unless it was made in writing and signed by Ziggy.