(redirected from interline)
Also found in: Dictionary, Wikipedia.


The process of writing between the lines of an instrument; that which is written between the lines of a document.

An interlineation frequently appears in a contract that has been typed and signed. If the parties agree that a sentence is to be inserted between the lines to clarify a particular provision, the new sentence is known as an interlineation. The new line should be initialed and dated to indicate that both parties are aware of and agree to its insertion. An interlineation results in the alteration of an instrument.


Alteration of Instruments.

West's Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.


n. the act of writing between the lines of a document, usually to add something that was omitted or thought of later. The issue (debated question) is whether both parties to a document (a contract, for example) had agreed upon the addition, or whether the new words were part of the document (like a will) when it was signed. Good practice is either to have all parties initial the change at the point of the writing or have the document re-typed and then signed.

Copyright © 1981-2005 by Gerald N. Hill and Kathleen T. Hill. All Right reserved.

INTERLINEATION, contracts, evidence. Writing between two lines.
     2. Interlineations are made either before or after the execution of an instrument. Those made before should be noted previously to its execution; those made after are made either by the party in whose favor they are, or by strangers.
     3. When made by the party himself, whether the interlineation be material or immaterial, they render the deed void; 1 Gall. Rep. 71; unless made with the consent of the opposite party. Vide 11 Co. 27 a: 9 Mass. Rep. 307; 15 Johns. R. 293; 1 Dall. R. 57; 1 Halst. R. 215; but see 1 Pet. C. C. R. 364; 5 Har. & John; 41; 2 L. R. 290; 2 Ch. R. 410; 4 Bing. R. 123; Fitzg. 207, 223; Cov. on Conv. Ev. 22; 2 Barr. 191.
     4. When the interlineation is made by a stranger, if it be immaterial, it will not vitiate the instrument, but if it be material, it will in general avoid it. Vide Cruise, Dig. tit. 32, c. 26, s. 8; Com. Dig. Fait, F 1.
     5. The ancient rule, which is still said to be in force, is, that an alteration shall be presumed to have been made before the execution of the instrument. Vin. Ab. Evidence, Q, a 2; Id. Faits, U; 1 Swift's Syst. 310; 6 Wheat. R. 481; 1 Halst. 215. But other cases hold the presumption to be that a material interlineation was made after the execution of an instrument, unless the contrary be proved. 1 Dall. 67. This doctrine corresponds nearly with the rules of the canon law on this subject. The canonists have examined it with care. Vide 18 Pick. R. 172; Toull. Dr. Civ. Fr. liv. 3, t. 3, c. 4, n. 115, and article Erasure.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
The new interline partnership is intended to connect travellers to Brazil and beyond through New York's JFK International Airport and Orlando International Airport.
Continental Airlines (NYSE: CAL) has announced that with the implementation of interline eTicket with Air Europa, it has completed interline eTicket capability with all of its alliance partners, including all current and planned members of SkyTeam and planned SkyTeam associates, as well as all other codeshare and frequent flyer partners.
The two investors agreed on 29 May to take Interline Brands private at USD25.50 (EUR19.94) a share, or some USD1.1bn in total, including assumption of debt.
GOL said the Interline agreement will allow the airline to offer its passengers flights to destinations such as Araguaina, Alta Floresta, Pampulha, Barreiras, Carajas, Ji-Parana, Juazeiro do Norte, Londrina, Cascavel, Ribeirao Preto, Rondonopolis, Vitoria da Conquista, Sao Jose do Rio Preto, Sinop and Uberlandia.
JetBlue Airways Corporation (NASDAQ:JBLU), a US-based airline company, has announced an interline partnership with JAL (TOKYO: 9205.TO) (NASDAQ-OTCBB: JALSY), a Japan-based airline company.
The interline agreement is intended to connect travellers seamlessly between both carrier's networks via New York's JFK International Airport and Washington Dulles International Airport.
The new "hub-to-hub" connection means that message routing between carriers is now handled at the application level rather than creating a distinct communication layer for each interline connection.
30 August 2012 - US maintenance, repair and operations (MRO) products distributor and marketer Interline Brands Inc (NYSE:IBI) said its shareholders had voted in favour of a proposed acquisition by private equity investors GS Capital Partners LP and P2 Capital Partners LLC.
California based carrier Virgin America on Wednesday announced that it has signed a new interline agreement with China Airlines.
Airlines urged to gear up for Simplified Interline Settlement.