SCHENECTADY, N.Y.
Jul 7, 2004

Authentidate Holding Corp. (Nasdaq:ADAT) announced today that Concepts in Data Management Incorporated (CDM), of Ontario, Canada has purchased a block of United States Postal Service's (USPS) Electronic Postmarks(TM) (USPS EPM(TM)) for use with its newly released TransactionDesk service. In addition to the initial purchase of EPMs, CDM has integrated the USPS EPM into its new TransactionDesk Service.

CDM, the creator of InstanetForms (instanetforms.com), the web-based real estate forms management solution offering real estate associations, brokers and agents a full on-line contract management service is now releasing the TransactionDesk service (TransactionDesk.com). TransactionDesk is based on the InstanetForms technology and incorporates the USPS EPM providing a complete end to end real estate transaction management system with interactive digitally signed contracts.

InstanetForms currently has over 175,000 users and is available to over 40 state and local real estate associations for internet contract management services.

The TransactionDesk service does not require any software installation, third party viewers or form libraries to be downloaded in order to access the service. TransactionDesk users can use any computer with a web browser and Adobe acrobat(R) reader installed to securely manage their contracts and forms.

Through the TransactionDesk service, agents can present, sign and deliver their clients' contracts for approval and/or acceptance in real time without couriering contracts. The TransactionDesk service also provides a 'Signing' service that enable users to secure, sign and deliver contracts created on-line using the USPS EPM and the InstanetForms internet fax server.

All information that is collected in the transaction using the TransactionDesk service can then be signed and time stamped using the USPS EPM and electronically delivered to the title and mortgage companies to expedite the closing process.

Authentidate and United States Postal Service (USPS) Electronic Post Mark (EPM) provides TransactionDesk with secure on-line content authentication, time stamps and a trusted 3rd party audit trail to offer its customers with an added level of trust and integrity to their on-line real estate contracts.

"After exhaustive research in digital signature and time-stamping technologies we have concluded that the USPS EPM is the best solution available to secure and timestamp the contracts and data created and maintained within the TransactionDesk service. By incorporating the EPM into the TransactionDesk we know our users and clients will feel comfortable and confident knowing the US Postal Service is securing the content of their on-line contracts and transactions," said Martin Scrocchi, CEO of CDM, Inc. "Together the EPM and the TransactionDesk service enables real estate professionals to manage a complete real estate transaction end to end, including negotiating interactive contracts on-line in one single application. We are also excited in the potential uses of the TransactionDesk service together with the EPM in other verticals."

"The paper intensive real estate industry is a perfect fit for the EPM solution," stated John Botti, Chairman and CEO of Authentidate. "We are pleased to have a working relationship with CDM and look forward to building on that relationship to streamline the real estate industry."

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 Concepts In Data Management Inc.

CDM has developed and marketed contract and form management solutions to the real estate industry since 1994. CDM released InstanetForms in October 1998 establishing itself as the leader in real estate forms technologies. InstanetForms currently has over 175,000 users and is available to over 40 state and local real estate Associations for internet Contract Management Services. Since January 2002 over 1,900,000 contracts have been completed and modified with over 2,500,000 logins from our users.

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.

SOURCE: Authentidate Holding Corp.