EXHIBIT 5.1
                                                                     -----------

                   [LETTERHEAD OF KIRKPATRICK & LOCKHART LLP]


July 20, 2004


LocatePLUS Holdings Corporation
100 Cummings Center, Suite 235M
Beverly, Massachusetts 01915


         RE:  LOCATEPLUS HOLDINGS CORPORATION -
              REGISTRATION STATEMENT ON FORM SB-2
              -----------------------------------


Ladies and Gentlemen:

         We have acted as special counsel to LocatePLUS Holdings Corporation
(the "Corporation") in connection with the preparation of a Registration
Statement on Form SB-2 filed with the Securities and Exchange Commission
pursuant to the Securities Act of 1933, as amended (the "Securities Act"),
relating to the proposed resale of up to 12,820,000 shares of the Corporation's
Class A Voting Common Stock, par value $0.01 per share (the "Common Stock").

         You have requested our opinion as to the matters set forth below in
connection with the Registration Statement. For purposes of rendering that
opinion, we have examined the Registration Statement, and we have examined the
Corporation's Amended and Restated Certificate of Incorporation, as amended to
date, the Corporation's By-laws, as amended to date, and the applicable minutes
and resolutions of the Corporation's Board of Directors and stockholders. We
have also examined such other documents, certificates, instruments and corporate
records as we have deemed necessary or appropriate for the purpose of this
opinion. In rendering our opinion, we also have made the assumptions that are
customary in opinion letters of this kind. We have not verified any of those
assumptions. Our opinion in paragraph 1 below, insofar as it relates to the
certain Selling Stockholder's shares being fully paid, is based solely on a
certificate of an officer of the Company confirming the Company's receipt of the
consideration called for by the applicable resolutions authorizing the issuance
of such shares.

         Based upon the foregoing, we are of the opinion that:

         1.    the issued and outstanding shares of Common Stock to be sold by
               NFC Corporation are validly issued, and upon completion of
               certain services to be performed for the benefit of the Company,
               will be fully paid and non-assessable;

         2.    the shares to be issued upon exercise of the Warrant (as defined
               in the Registration Statement) have been duly authorized, and
               when issued pursuant to in accordance with the terms of the
               Warrant, will be validly issued, fully paid and non-assessable;
               and

         3.    the shares to be issued upon conversion of the Note (as defined
               in the Registration Statement) have been duly authorized, and
               when issued, will be validly issued, fully paid and
               non-assessable.

LocatePLUS Holdings Corporation
July 19, 2004
Page 2 of 2







         We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to this firm in the related
Prospectus under the caption "Legal Matters." In giving our consent we do not
thereby admit that we are in the category of persons whose consent is required
under Section 7 of the 1933 Act or the rules and regulations thereunder.



                                                     Very truly yours,



                                                     KIRKPATRICK & LOCKHART LLP