Blank indorsement
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
One made by the mere writing of the indorser's name on the back of the note or bill, without mention of the name of any person in whose favor the indorsement is made, but with the implied understanding that any lawful holder may fill in his own name above the indorsement if he so chooses.
See Thornton v. Moody, 11 Me. 256; Scollans v. Rollins, 179 Mass. 346, 60 N. E. 983, 88 Am. St. Ren. 386; Malone v. Garver, 3 Neb. (Unof.) 710, 92 N. W. 726.