W delivers a cheque for $1000 in payment of a debt owed to X. X endorses the cheque to Y’s Second Hand Shop to purchase a television set. Y endorses the cheque to her landlord, Z, in part payment of her monthly rent. When Z takes the cheque to his bank, the teller recognizes W’s signature and has heard that he is in financial difficulty. She contacts W’s bank and learns that there are not sufficient funds in W’s account. What should Z do to protect his claim?