UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No.    )

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Filed by a Party other than the Registrant  ¨

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¨	Preliminary Proxy Statement	¨	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
¨	Definitive Proxy Statement
x	Definitive Additional Materials
¨	Soliciting Material Pursuant to §240.14a-12

VASCO Data Security International, Inc.

(Name of Registrant as Specified in Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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¨ Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

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BARCODE1 OF 212151234567123456712345671234567123456712345671234567 See the reverse side of this notice to obtainproxy materials and voting instructions.Broadridge Internal Use OnlyJob #Envelope #Sequence ## of # Sequence #*** Exercise Your Right to Vote ***Important Notice Regarding the Availability of Proxy Materials for theStockholder Meeting to Be Held on <mtgdate>.You are receiving this communication because you holdshares in the above named company.This is not a ballot. You cannot use this notice to votethese shares. This communication presents only anoverview of the more complete proxy materials that areavailable to you on the Internet. You may view the proxymaterials online at www.proxyvote.com or easily request apaper copy (see reverse side).We encourage you to access and review all of the importantinformation contained in the proxy materials before voting.Meeting InformationMeeting Type: <mtgtype>For holders as of: <recdate>Date: Time: <mtgtime>Location:0000291526_1 R1.0.1.25VASCO DATA SECURITY INTERNATIONAL, INC.Vasco Data Security International, Inc.1901 S Meyers RoadSuite 210Oakbrook Terrace, IL 60181-5206Investor Address Line 1Investor Address Line 2Investor Address Line 3Investor Address Line 4Investor Address Line 5John Sample1234 ANYWHERE STREETANY CITY, ON A1A 1A1Annual MeetingApril 26, 2016June 15, 2016June 15, 2016 10:00 AM CDT1901 S. Meyers RoadOakbrook Terrace, IL 60181

Internal UseOnlyPlease Choose One of the Following Voting MethodsVote In Person: Many stockholder meetings have attendance requirements including, but not limited to, the possessionof an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any specialrequirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the boxmarked by the arrow available and follow the instructions.Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.How To Vote?Before You VoteHow to Access the Proxy MaterialsProxy Materials Available to VIEW or RECEIVE:How to View Online:Have the information that is printed in the box marked by the arrow (located on thefollowing page) and visit: www.proxyvote.com.How to Request and Receive a PAPER or E-MAIL Copy:If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge forrequesting a copy. Please choose one of the following methods to make your request:1) BY INTERNET: www.proxyvote.com2) BY TELEPHONE: 1-800-579-16393) BY E-MAIL*: sendmaterial@proxyvote.com* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box markedby the arrow (located on the following page) in the subject line.??0000291526_2 R1.0.1.251. Annual Report 2. Notice & Proxy StatementRequests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investmentadvisor. Please make the request as instructed above on or before June 01, 2016 to facilitate timely delivery.

BARCODE12345678901212345678901212345678901212345678901212345678901212345678901212345678901212345678901212
3456789012123456789012123456789012123456789012Broadridge Internal Use OnlyxxxxxxxxxxxxxxxxxxxxCusipJob #Envelope #Sequence ## of # Sequence #Voting items0000291526_3 R1.0.1.25The Board of Directors recommends you voteFOR the following:1. Election of DirectorsNominees01 T. Kendall Hunt 02 Michael P. Cullinane 03 John N. Fox, Jr. 04 Jean K. Holley 05 Matthew MoogThe Board of Directors recommends you vote FOR the following proposal:2. Ratify the appointment of KPMG LLP as independent registered accounting firm for the fiscal year endingDecember 31, 2016.NOTE: Such other business as may properly come before the meeting or any adjournment thereof.

THIS SPACE RESERVED FOR SIGNATURES IF APPLICABLEReserved for Broadridge Internal Control InformationBroadridge Internal Use OnlyJob #Envelope #Sequence ## of # Sequence #NAMETHE COMPANY NAME INC.—COMMON 123,456,789,012.12345THE COMPANY NAME INC.—CLASS A 123,456,789,012.12345THE COMPANY NAME INC.—CLASS B 123,456,789,012.12345THE COMPANY NAME INC.—CLASS C 123,456,789,012.12345THE COMPANY NAME INC.—CLASS D 123,456,789,012.12345THE COMPANY NAME INC.—CLASS E 123,456,789,012.12345THE COMPANY NAME INC.—CLASS F 123,456,789,012.12345THE COMPANY NAME INC.—401 K 123,456,789,012.123450000291526_4 R1.0.1.25