Exhibit 5
                                      INVISA

                           Opinion of William W. Dolan

June 24, 2003

Board of Directors
Invisa, Inc.
4400 Independence Court
Sarasota, Florida 34234

Gentlemen:

     You have requested my opinion as the Company's general counsel with respect
to certain matters in connection with the filing by Invisa, Inc. (the "Company")
of a Registration Statement on Form SB2 (the "Registration Statement") with the
Securities Exchange Commission regarding the registration of the shares of the
Company's Common Stock, $0.001 par value described in the Registration Statement
("Shares").

     I am furnishing this opinion to you in accordance with Item 601(b)(5) of
Regulation S-B promulgated under the 1933 Act for filing as Exhibit 5 to the
Registration Statement.

     I am familiar with the Registration Statement, and I have examined the
Corporation's Certificate of Incorporation as amended to date, the Corporation's
By-Laws, as amended to date and minutes and resolutions of the Corporation's
Board of Directors and shareholders. I have also examined such other documents,
certificates, instruments and corporate records, and such statutes, decisions
and questions of law as I have deemed necessary or appropriate for the purpose
of this opinion. In such examinations, I have assumed the genuineness of
signatures and the conformity to the originals of the documents supplied to me
as copies.  As to various questions of fact material to this opinion, I have
relied upon statements and certificates of officers and representatives of the
Company.

     On the basis of the foregoing, and in reliance thereon, I am of the opinion
that the Shares, when sold and issued, will be validly issued, fully paid and
nonassessable.

     This opinion is rendered only with regard to the matters set forth in the
paragraph above. No other opinions are intended nor should they be inferred.

     I am furnishing this opinion letter to you solely for your benefit in
connection with the Registration Statement referenced herein. I disclaim any
obligation to update this opinion letter for changes of fact, law or otherwise.

     I am a member of the Florida Bar. I call your attention to the fact that
Invisa, Inc. is a Nevada Corporation.

     I hereby consent to the filing of this opinion as Exhibit 5 to the
Registration Statement.

Very Truly Yours,

    /s/  William W. Dolan
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William W. Dolan