activePDF, Inc. Enables Digital PDF Signing With United States Postal Service Electronic Postmark.

SCHENECTADY, N.Y. -- activePDF, Inc., a leading provider of PDF conversion and development tools, and AuthentiDate, Inc., a subsidiary of AuthentiDate Holding Corp. (NASDAQ: ADAT), the technical provider of the United States Postal Service Electronic Postmark(R) (USPS EPM(R)), announced today that the USPS EPM has been integrated to work with activePDF Toolkit(TM). activePDF Toolkit is a scalable, programmable, COM object that allows dynamic creation and manipulation of PDF files.

By enabling the USPS EPM service in its Toolkit, activePDF provides its growing list of 9,000 customers with an added level of trust and integrity for their electronic communications. activePDF Toolkit now provides the capability to apply the USPS EPM for time and date stamping, and to enable digital signing of PDF files.

Backed by the integrity of the United States Postal Service, the USPS EPM can detect unauthorized document tampering. Application of the USPS EPM also automatically creates an electronic "fingerprint" as evidence of electronic file content, which is stored for a period of seven years in a third-party repository. During this seven-year time period the original electronically postmarked document can be verified to detect content tampering. As such, the USPS EPM serves as an invaluable non-repudiation tool.

"activePDF is delighted to offer the United States Postal Service EPM to our customers as a solution for conducting transactions securely online," stated Tim Sullivan, CEO and Chairman of activePDF. "We are able to provide a cost-effective solution for customers looking to guarantee the integrity of their electronic documents. activePDF Toolkit customers can now easily integrate EPM technology into their business processes and online transaction systems, thereby increasing consumer confidence while ensuring validity of critical data."

"We are excited about working with activePDF on this venture," AuthentiDate Chairman and CEO John Botti said. "With an impressive list of over 9,000 existing customers, we are confident that activePDF will help to expand the use of the EPM and assure its place in everyday business transactions."

About AuthentiDate Holding Corp.

AuthentiDate Holding Corp. (AHC) is the holding company of five business units: DocStar, AuthentiDate International AG, AuthentiDate, Inc., DJS Marketing Group/Computer Professionals International and Trac Medical Solutions, Inc. DocStar sells proprietary document imaging software that includes the AuthentiDate technology. AuthentiDate and AuthentiDate AG provide the authentication of digital data through its proprietary and patent pending technology. AuthentiDate intends to establish itself as the authority on "content security" as it is a growing sector of the electronic network security infrastructure market. DJS delivers professional services centered around technology systems integration projects, staff augmentation, out-tasking, outsourcing services and resells computer related products. Trac Medical offers an electronic form processing solution and utilizes the AuthentiDate technology to prove the authenticity of the content represented in completed healthcare forms.

About activePDF

activePDF is a leading provider of PDF development and conversion tools for the Windows operating system. Founded in January 2000, activePDF remains unique in the PDF industry by offering the most comprehensive server-side PDF tools that eliminate the overhead typically associated with dynamic PDF generation and manipulation products. With no per-user or per-document licensing fees, activePDF is the only provider to offer COM-object level access in all of its products, affording developers complete control over their PDF generation, conversion and manipulation processes. In addition, activePDF also offers affordable desktop tools for PDF creation and editing, providing corporate and government clients alike, cost-effective, end-to-end solutions for all PDF generation and manipulation requirements. Committed to delivering innovation, activePDF prides itself on providing high-quality products and renowned customer service to its clients and strategic business partners. activePDF has built a substantial market presence with over 9,000 customers and approximately 35,000 server and client licenses worldwide. Headquartered in Mission Viejo, California, activePDF is privately held and self-funded, with a global distribution network spanning every continent. activePDF clients consist of almost 40% of Fortune and Global 500 organizations, with customers representing every industry - including IBM, NASA, Harvard University, Warner Bros., Citibank, ACCOR, Siemens, AXA, L'Oreal and Proctor & Gamble. More info: www.activePDF.com.

About activePDF Toolkit(TM)

activePDF Toolkit is a scalable, programmable COM object that allows you to dynamically create and manipulate PDF files. With Toolkit's robust API, the automation of virtually any PDF manipulation task becomes possible - users can append, stamp, stitch, merge, paint, form-fill, secure PDF and more. Adding watermarks, setting form fields, incorporating headers and footers, adding bookmarks, and many other tasks are all made simple with activePDF Toolkit. Within today's web-based work environments, activePDF Toolkit also provides the functionality to transfer HTML form content into tamperproof PDF forms, detect PDF modification, and secure confidential documents such as contracts, invoices, and financial statements.

This press release contains forward-looking statements within the meaning of section 27A of the Securities Act of 1933 and section 21E of the Securities Act of 1934. When used in this release, the words "believe," "anticipate," "think," "intend," "plan," "will be," "expect," and similar expressions identify such forward-looking statements. Such statements regarding future events and/or the future financial performance of The Company are subject to certain risks and uncertainties, which could cause actual events or the actual future results of the Company to differ materially from any forward-looking statement. Such risks and uncertainties include, among other things, the availability of any needed financing, the Company's ability to implement its business plan for various applications of its technologies, the impact of competition, the management of growth, and the other risks and uncertainties that may be detailed from time to time in the Company's reports filed with the Securities and Exchange Commission. In light of the significant risks and uncertainties inherent in the forward-looking statements included herein, the inclusion of such statements should not be regarded as a representation by the Company or any other person that the objectives and plans of the Company will be achieved.