================================================================================ FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of December, 2005 Commission File Number: 333-07654 ENDESA, S.A. (Translation of Registrant's Name into English) Ribera del Loira, 60 28042 Madrid, Spain (Address of principal executive office) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F: Form 20-F X Form 40-F --- --- Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): Yes No X --- --- Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): Yes No X --- --- Indicate by check mark whether by furnishing the information contained in this Form, the Registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934: Yes No X --- --- If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): N/A --- ================================================================================ ENDESA S.A. Payment of Interim Dividend Announcement NEW YORK--(BUSINESS WIRE)--Dec. 21, 2005--At its meeting of November 15, 2005, ENDESA's (NYSE:ELE) Board of Directors agreed to pay an interim gross dividend of 0.305 euros per share from January 2, 2006, to be charged against 2005 earnings, in accordance with the provisions of Article 216 of Spanish Companies Law. As a result, ENDESA shares will trade ex-dividend from 2 January 2006. The net payment, after the corresponding tax withholding, will be made via Santander Investment Services, S.A. - entity code 0036 - in accordance with prevailing provisions for participating entities, using Iberclear's system available to the custodian entities upon presentation of credential for the shares under their custody. The agreement of the Board of Directors to pay an interim dividend was notified to the Spanish stock market regulator, the CNMV, on November 16, 2005. Madrid, December 20th, 2005. Endesa's CFO, Mr. Jose Luis Palomo Alvarez CONTACT: ENDESA North America Investor Relations Office Alvaro Perez de Lema, 212-750-7200 http://www.endesa.es SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. ENDESA, S.A. Dated: December 21st, 2005 By: /s/ Alvaro Perez de Lema -------------------------- Name: Alvaro Perez de Lema Title: Manager of North America Investor Relations