Saving Endangered Species With World Wildlife Fund One PhotoStamp™ at a Time

LOS ANGELES, September 15, 2004 – Stamps.com® (Nasdaq: STMP) is proud to announce an innovative and exciting program to help save endangered species through a partnership with World Wildlife Fund (WWF). Beginning tomorrow, Stamps.com will offer a series of endangered species PhotoStamps, with a percentage of sales benefiting WWF’s conservation work around the world.

For the Stamps.com launch of the endangered animal series, WWF will make available high–quality images of a giant panda, a one–horned rhino, a Bengal tiger, a lowland gorilla and an African elephant. Beginning September 16th, these PhotoStamps will be available online at www.photostamps.com. Customers can select the image of one of these animals, customize the border and postage amount, and then place their order online.

By purchasing WWF PhotoStamps, customers will help WWF to save endangered animals and their habitats. To get the program started, Stamps.com will donate half of the sale price for each sheet of WWF PhotoStamps sold from now through September 30 to the organization.

“There’s tremendous excitement here about working with a leading cause like World Wildlife Fund. This is the first time that Stamps.com has partnered with a conservation organization,” said Stamps.com CEO Ken McBride. “PhotoStamps represent a real innovation for charities and non–profit organizations. Many charities and non–profits are already using PhotoStamps in innovative ways to raise money for their causes such as improving the impact of their direct mailings or as a great donor gift. We’re very proud to encourage such great applications of PhotoStamps.”

WWF Vice President of Marketing, Mark Pilipczuk added, “We are excited about this partnership, which is a wonderful opportunity to reach out and engage the public in raising funds to help WWF protect the world’s endangered species. We look forward to our alliance with Stamps.com, and to having the PhotoStamps fuel greater awareness of our conservation work.”

About World Wildlife Fund

Known worldwide by its panda logo, WWF leads international efforts to protect endangered species and their habitats. Now in its fifth decade, WWF works in more than 100 countries around the globe to conserve the diversity of life on Earth. With nearly 1.2 million members in the U.S. WWF is the world’s largest privately financed conservation organization. For more information, visit www.worldwildlife.org.

About PhotoStamps

PhotoStamps is a PC Postage product brought to you by Stamps.com Inc., the leading provider of Internet–based postage services. In addition to providing the PhotoStamps product, Stamps.com PC Postage Service enables over 300,000 customers to print U.S. Postal Service–approved postage with just a PC, printer and Internet connection. The Company targets its PC Postage services to small businesses and home offices, and currently has partnerships with companies including Microsoft, CompUSA, EarthLink, HP, NCR, Office Depot, and Vendio.

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995: This release may contain forward–looking statements that involve risks and uncertainties. Important factors, including the Company’s ability to complete its products and obtain regulatory approval, which could cause actual results to differ materially from those in the forward–looking statements, are detailed in filings with the Securities and Exchange Commission made from time to time by Stamps.com, including its Annual Report on Form 10–K for the fiscal year ended December 31, 2003, Quarterly Reports on Form 10–Q, and Current Reports on Form 8–K. Stamps.com undertakes no obligation to release publicly any revisions to any forward–looking statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

Stamps.com, the Stamps.com logo and PhotoStamps are trademarks or registered trademarks of Stamps.com Inc. All other brands and names are property of their respective owners.