SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) IDT CORPORATION -------------------------------------------------------------------------------- (Name of Issuer) Class B Common Stock, par value $.01 per share -------------------------------------------------------------------------------- (Title of Class of Securities) 448947309 -------------------------------------------------------------------------------- (CUSIP Number) January 10, 2003 -------------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [ ] Rule 13d-1(b) [X] Rule 13d-1(c) [ ] Rule 13d-1(d) 1 ------------------- ------------------- CUSIP No. 448947309 13G ------------------- ------------------- -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Greenlight Capital, L.L.C. -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 3,793,400 NUMBER OF ------------------------------------------------ SHARES 6 SHARED VOTING POWER BENEFICIALLY OWNED BY 0 EACH ------------------------------------------------ REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 3,793,400 ------------------------------------------------ 8 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,793,400 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 7.0% ** -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* CO -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT **SEE ITEM 4(b). 2 ------------------- ------------------- CUSIP No. 448947309 13G ------------------- ------------------- -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) David Einhorn -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 3,793,400 ------------------------------------------------ NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 0 OWNED BY ------------------------------------------------ EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON WITH 3,793,400 ------------------------------------------------ 8 SHARED DISPOSITIVE POWER 0 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,793,400 -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 7.0% ** -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IN -------------------------------------------------------------------------------- *SEE INSTRUCTIONS BEFORE FILLING OUT **SEE ITEM 4(b). 3 SCHEDULE 13G This Schedule 13G (the "Schedule 13G") is being filed on behalf of Greenlight Capital, L.L.C., a Delaware limited liability company ("Greenlight"), and Mr. David Einhorn, principal of Greenlight, relating to shares of Class B Common Stock of IDT Corporation, a Delaware corporation (the "Issuer"). This Schedule 13G relates to shares of Class B Common Stock of the Issuer purchased by Greenlight for the account of (i) Greenlight Capital, L.P. ("Greenlight Fund"), of which Greenlight is the general partner, (ii) Greenlight Capital Qualified, L.P. ("Greenlight Qualified"), of which Greenlight is the general partner and (iii) Greenlight Capital Offshore, Ltd. ("Greenlight Offshore"), to which Greenlight acts as investment advisor. ITEM 1(a) NAME OF ISSUER. IDT Corporation ITEM 1(b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES. 190 Main Street Hackensack, New Jersey 07601 ITEM 2(a) NAME OF PERSON FILING. Greenlight and David Einhorn ITEM 2(b) ADDRESS OF PRINCIPAL BUSINESS OFFICE, OR, IF NONE, RESIDENCE. 420 Lexington Ave., Suite 1740 New York, New York 10170 ITEM 2(c) CITIZENSHIP OR PLACE OF ORGANIZATION. Greenlight is a limited liability company organized under the laws of the State of Delaware. David Einhorn is the principal of Greenlight and a United States citizen. ITEM 2(d) TITLE OF CLASS OF SECURITIES. Class B Common Stock, par value $0.01 per share (the "Class B Common Stock"). ITEM 2(e) CUSIP NUMBER. 448947309 4 ITEM 3 REPORTING PERSON. Inapplicable. ITEM 4 OWNERSHIP. (a) Greenlight and Mr. Einhorn are the beneficial owners of 3,793,400 shares of Class B Common Stock. (b) Greenlight and Mr. Einhorn are the beneficial owners of 7.0% of the outstanding shares of Class B Common Stock. This percentage is determined by dividing 3,793,400 by 54,445,566, the number of shares of Class B Common Stock issued and outstanding as of March 13, 2003, as reported in the Issuer's quarterly report on Form 10-Q filed March 14, 2003. (c) Greenlight has the sole power to vote and dispose of the 3,793,400 shares of Class B Common Stock beneficially owned by it. As the principal of Greenlight, Mr. Einhorn may direct the vote and disposition of the 3,793,400 shares of Class B Common Stock beneficially owned by Greenlight. ITEM 5 OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS. Inapplicable. ITEM 6 OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON. Inapplicable. ITEM 7 IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY. Inapplicable. ITEM 8 IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP. Inapplicable. ITEM 9 NOTICE OF DISSOLUTION OF GROUP. Inapplicable. ITEM 10 CERTIFICATION. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. 5 EXHIBITS EXHIBIT 1 --------- Joint Filing Agreement dated March 19, 2003, between Greenlight and David Einhorn. 6 SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: March 19, 2003 Greenlight Capital, L.L.C. By: /s/ DAVID EINHORN ------------------------------ David Einhorn, Managing Member /s/ DAVID EINHORN ---------------------------------- David Einhorn 7