Exhibit 5.1


                       KRAMER LEVIN NAFTALIS & FRANKEL LLP

                                919 THIRD AVENUE

                            NEW YORK, NY 10022 - 3852


                                                                          PARIS
TEL  212-715-9100                                        47, AVENUE HOCHE 75008
FAX  212-715-8000                                       TEL  (33-1) 44 09 46 00
                                                        FAX  (33-1) 44 09 46 01


November 19, 2003

Internet Commerce Corporation
805 Third Avenue
New York, New York  10022

         Re:      Internet Commerce Corporation
                  Amendment No. 1 to Form S-3
                  File No. 333-107590
                  -----------------------------

Ladies and Gentlemen:

         We have acted as counsel to Internet Commerce Corporation, a Delaware
corporation (the "Registrant"), in connection with the preparation and filing of
Amendment No. 1 to the Registration Statement on Form S-3, file no. 333-107590
(the "Registration Statement") with the Securities and Exchange Commission (the
"SEC") with respect to the registration under the Securities Act of 1933, as
amended (the "Act"), of an aggregate of 3,471,091 shares (the "Shares") of class
A common stock, par value $0.01 per share (the "Common Stock"), of the
Registrant, which includes 1,585,525 shares of Common Stock issuable upon the
exercise of warrants and 192,307 shares of Common Stock issuable upon conversion
of series D convertible preferred stock, par value $0.01 per share (the "Series
D Preferred").

         In connection with the registration of the Shares, we have reviewed
copies of the following documents:

         1.   the Registration Statement;

         2.   the Amended and Restated Certificate of Incorporation of the
              Registrant, as amended;

         3.   the By-laws of the Registrant;

         4.   the Certificate of Designations of the Series D Preferred (the
              "Certificate of Designations");

         5.   the Subscription Agreement dated April 30, 2003 between the
              Registrant and purchasers of the Common Stock identified therein;

         6.   the Subscription Agreement dated April 30, 2003 between the
              Registrant and purchaser of the Series D Preferred identified
              therein;

         7.   the form of Warrant Agreement dated April 30, 2003;

         8.   the form of Warrant Agreement dated May 1, 2003;

         9.   the Accounts Receivable Financing Agreement dated as of May 30,
              2003 between the Registrant and Silicon Valley Bank, a
              California-chartered bank (the "Bank");

         10.  the Registration Rights Agreement dated May 30, 2003 by and among
              the Registrant and the Bank;



Internet Commerce Corporation
November 19, 2003
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         11.  the Warrant to Purchase Stock dated May 30, 2003 and issued to the
              Bank;

         12.  resolutions of the Board of Directors of the Registrant; and

         13.  such other documents and records as we have deemed necessary to
              enable us to express an opinion on the matters covered hereby.

         In rendering this opinion, we have: (a) assumed (i) the genuineness of
all signatures on all documents reviewed by us, (ii) the authenticity of all
documents submitted to us as originals and (iii) the conformity to original
documents of all documents submitted to us as photostatic or conformed copies
and the authenticity of the originals of such copies; and (b) relied on (i)
representations, statements and certificates of public officials and others and
(ii) as to matters of fact, statements, representations and certificates of
officers and representatives of the Registrant.

         Based upon the foregoing, we are of the opinion that the Shares covered
by the Registration Statement have been or, in the case of Shares issuable upon
(i) exercise of warrants, when issued in accordance with the terms of such
warrants, and (ii) conversion of the Series D Preferred, when issued in
accordance with the terms of the Certificate of Designations, will be validly
issued, fully paid and non-assessable.

         We hereby consent to the use of this opinion as an exhibit to the
Registration Statement. In giving the foregoing consent, we do not thereby admit
that we are in the category of persons whose consent is required under Section 7
of the Act or the rules and regulations of the Securities and Exchange
Commission thereunder.

         We do not express any opinion with respect to any law other than the
General Corporation Law of the State of Delaware and the federal laws of the
United States of America. Our opinion is rendered only with respect to the laws
which are currently in effect in such jurisdictions.

                                         Very truly yours,


                                         /s/ Kramer Levin Naftalis & Frankel LLP