Exhibit (a)(5)(UUU)

See you soon.

Thanks to everybody who has given us their support.

Finally, due to the latest events, we have decided not to execute the tender offer over Endesa, as this is the most positive thing for the company, its employees and the Spanish economy in general.

But we are not leaving.

Soon, we are going to be helping to build a free, stronger and more secure Spanish energy market from our new company.

See you.

e-on

New energy

On January 26, 2007, E.ON Aktiengesellschaft ("E.ON"), through its wholly owned subsidiary E.ON Zwölfte Verwaltungs GmbH, filed a tender offer statement on Schedule TO regarding its tender offer for ordinary shares and ADSs of Endesa S.A. ("Endesa") with the U.S. Securities and Exchange Commission ("SEC"). Endesa investors and security holders are urged to read the U.S. tender offer statement (as updated and amended), because it contains important information. Furthermore, Endesa investors and security holders are urged to read the Spanish prospectus from E.ON regarding the Spanish tender offer for Endesa because it contains important information. The Spanish prospectus and certain complementary documentation were authorized in Spain by the Spanish Comisión Nacional del Mercado de Valores (the "CNMV'). Investors and security holders may obtain a free copy of the Spanish prospectus and its complementary documentation from E.ON, Endesa, the four Spanish Stock Exchanges, Santander Investment Bolsa SV SA, Santander Investment SA, Corredores de Bolsa, and elsewhere. The Spanish prospectus is also available on the web sites of the CNMV (www.cnmv.es), E.ON (www.eon.com), and elsewhere. Likewise, Endesa investors and security holders may obtain a free copy of the U.S. tender offer statement and other documents filed by E.ON with the SEC on the SEC's web site at www.sec.gov. The U.S. tender offer statement and these other documents may also be obtained for free from E.ON by directing a request to E.ON AG, External Communications, Tel.: 0211- 45 79 - 453.