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.
As in the case of other assignments of title, the purpose for which the indorsement is given may be shown as long as the legal effect of the indorsement is not contradicted.1 Thus an indorsement in blank may be shown to be for collection only,2 or as collateral security.3 However, a blank indorsement to a bank, credit for the amount of the instrument being given to the indorser, cannot be shown to be for collection only.4 If the indorsement shows the purpose of the instrument, however, extrinsic evidence is not admissible to contradict the purpose therein expressed. Thus an indorsement for collection cannot be shown by parol to have been intended as an absolute indorsement.5 So "Pay to the order of R. C. O., cashier, for account" of a given bank, shows an indorsement for collection only. Extrinsic evidence is inadmissible to show that the indorsement was an absolute transfer.6
1 Carter v. Long, 125 Ala. 280; 28 So. 74; Kingsland v. Koepper, 137 111. 344; 13 L. R. A. 649; 28 N. E. 48; Fullerton v. Hill, 48 Kan. 558; 18 L. R. A. 33; 29 Pac. 583; Herndon v. Lewis, 175 Mo. 116; 74 S. W. 976; Elliott v. Moreland, -N. J. L. -; 54 Atl. 224; Ewan v. Brooks-Waterfield Co., 55 O. S. 596; 60 Am. St. Rep. 719; 35 L. R. A. 786; 45 N. E. 1094.
2 Commercial National Bank v. Atkinson, 62 Kan. 775; 64 Pac. 617; Richardson v. Foster, 73 Miss. 12; 55 Am. St. Rep. 481; 18 So. 573; Young v. Sehon, 53 W. Va. 127; 97 Am. St. Rep. 970; 44 S. E. 136.
3 Witherow v. Slayback, 158 N. Y. 649; 70 Am. St. Rep. 507; 53 N. E. 681. (So the directors of the indorsing corporation are liable by statute for not including such note in their report filed after the note was given but before it fell due.)
4 Fullerton v. Hill, 48 Kan. 558; 18 L. R. A. 33; 29 Pac. 583.
5 Sloan v. Gibbes, 56 S. C. 480; 76 Am. St. Rep. 559; 35 S. E. 408; [citing Phillips v. Preston, 5 How. (U. S.) 278; Graves v. Johnson, 48
Conn. 160; 40 Am. Rep. 162; Holmes v. Bank, 38 Neb. 326; 41 Am. St. Rep. 733; 56 N. W. 1011; Taylor v. French, 2 Lea (Tenn.) 257; 31 Am. Rep. 609]; Brewer v. Woodward, 54 Vt. 581; 41 Am. Rep. 857.
6 Indorser - by statute. Spencer v. Allerton, 60 Conn. 410; 13 L. R. A. 806; 13 L. R. A. 806; 22 Atl. 778; (cannot be shown to be guarantor). Second indorser. Temple v. Baker, 125 Pa. St. 634; 11 Am. St. Rep. 926; 3 L. R. A. 709; 17 Atl. 516. (Oral evidence inadmissible to ' show a guarantor and hence liable to payee). Comaker, if indorsement before delivery. Dennis v. Jackson, 57 Minn. 286; 47 Am. St. Rep. 603; 59 N. W. 198. (Cannot be shown to be indorser.)
1 The last qualification of course applies in jurisdictions where an indorsement is held to be a complete contract, or else to indorsements in full which show the purpose for which they were given. Lawrence v. Bank, 6 Conn. 521; Hazzard v. Duke, 64 Ind. 220; Barker v. Prentiss, 6 Mass. 430.
 
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