STAMPS.COM SUES PITNEY BOWES FOR PATENT INFRINGEMENT

Company Asserts that Pitney Bowes Infringes Four Internet Postage Patents

Stamps.com Sues Pitney Bowes for Patent Infringement

Company Asserts that Pitney Bowes Infringes Four Internet Postage Patents

SANTA MONICA, Calif., June 14 — Stamps.com Inc. (Nasdaq: STMP), announced today that it has filed a complaint against Pitney Bowes (NYSE: PBI) for infringing four of Stamps.com’s Internet Postage patents. These four patents were invented by Salim Kara, who was recognized by the National Postal Forum and the United States Postal Service with its Retail Postage Technology Award for being the “Inventor of Internet Postage.”

“We are committed to strategically managing our intellectual property portfolio to enhance shareholder value.” said Stamps.com chief executive officer Bruce Coleman. Stamps.com has more than 40 issued patents and over 80 pending patents worldwide.

About Stamps.com
Stamps.com (Nasdaq: STMP) is the leading provider of Internet-based postage services. Its flagship product, Stamps.com Internet Postage, enables customers to print U.S. Postal Service-approved postage via a computer and Internet connection. Based in Santa Monica, California, Stamps.com serves more than 300,000 customers.

“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 achieve profitability, 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, 2000, its quarterly report on Form 10-Q for the fiscal quarter ending March 31, 2001, and its 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, E-Stamp, and the Stamps.com logo are trademarks of Stamps.com Inc. All other brands and names are property of their respective owners.