Business Law 12th Edition by Roger LeRoy Miller ,Frank Cross

Exercise 7

Negotiable Instruments Sabrina Runyan writes the following note on a sheet of paper: "I, the undersigned, do hereby acknowledge that 1 owe Leo Woo one thousand dollars, with interest, payable out of the proceeds of the sale of my horse, Lightning, next month. Payment is to be made on or before six months from date." Discuss specifically why this is not a negotiable instrument.