This section is from the book "The Law Of Contracts", by William Herbert Page. Also available from Amazon: Commercial Contracts: A Practical Guide to Deals, Contracts, Agreements and Promises.
An attempt is sometimes made to show an extrinsic agreement by which a party to a negotiable instrument which was delivered for value is not to be held liable upon such instrument or by which he is not to be held liable under certain specified circumstances. By the great weight of authority such evidence is inadmissible.1 Evidence is inadmissible to show that accommodation makers are not to be obliged to pay if the real debtor is unable to do so.2 Extrinsic evidence is not admissible to show a prior agreement to the effect that a blank endorsement should not be operative.3
18 Hunter v. Byron, 92 Wash. 469, 159 Pac. 703.
19 "He is estopped thus brazenly to assert his own covinous purpose." Hunter v. Byron, 92 Wash. 469, 159 Pac. 703.
20 See Sec. 80 et seq.
12 See fSec. 80 et seq.
22 Grand Isle v. Kinney, 70 Vt. 381, 41 Atl. 130.
1 Kansas. Stevens v. Inch, 98 Kan. 306, 158 Pac. 43; German-American State Bank v. Watson, 99 Kan. 686, 163 Pac. 637.
Massachusetts. Neal v. Wilson, 213 Mass. 336, 100 N. E. 544.
Missouri. Bank v. Simmons, - Mo. - , 204 S. W. 837.
North Carolina. Bank v. Moore, 138 N. Car. 529, 51 S. E. 79; International Harvester Co. v. Parham, 172 N. Car. 389, 90 S. E. 503.
Ohio. Cummings v. Kent, 44 O. S. 92, 4 N. E. 710.
Washington. Post v. Tamm, 91 Wash. 504, 158 Pac. 91.
West Virginia. Long v. Potts, 70 W. Va. 719, 75 S. E. 62.