Disclosure announcement transmitted by euro adhoc.
  The issuer is responsible for the content of this announcement.

07.09.2006

Cologne, 7 September 2006 - The Board of Directors of DocCheck AG
(ISIN DE0005471007 // Symbol 547100) has decided today to commence a
share buy-back programme. The basis for the share buy-back is the
resolution adopted at the Annual General Meeting held on 31/05/2006
which authorised the buy-back of up to 590,431 shares by the 30
November 2007. As the result of an earlier buy-back programme, the
company already holds 91,500 shares. Initially the buy-back is
restricted to further 100,000 shares maximum (1.7 per cent of the
capital stock). The purchase of the shares commences on 11/09/2006
and takes place exclusively via the stock exchange. The purchase
price paid per share must not fall below or exceed by more than 10
per cent the price of a company share, as determined by the opening
auction held on the same trading day on the XETRA trading platform.
Aim of the share buy-back is to optimise the capital structure. All
transactions carried out during the course of the share buy-back
programme are published weekly on the DocCheck AG website
(www.doccheck.ag) under the heading Investor / Share Buy-Back.

end of announcement                               euro adhoc 07.09.2006 20:15:00

Further inquiry note:

Tanja Mumme
+49 (0)221 92053 139
tanja.mumme@doccheck.com

Branche: Computing & Information Technology
ISIN: DE0005471007
WKN: 547100
Index: CDAX, Prime All Share, Technologie All Share
Börsen: Frankfurter Wertpapierbörse / regulated dealing/prime
standard
Börse Berlin-Bremen / free trade
Hamburger Wertpapierbörse / free trade
Baden-Württembergische Wertpapierbörse / free trade
Börse Düsseldorf / free trade
Bayerische Börse / free trade