Federal Attorney for the issues of the Materials of the State Security Service of the former German Democratic Republic undertook numerous destroyed archival materials of Stasi (torn, shredded) and searched for solutions that allowed for faster reconstruction of the above-mentioned documents. In 2007 he started cooperation with the Fraunhofer Institute for Production Systems and Design Technology in Berlin that prepared the complex system allowing for automated virtual reconstruction of the destroyed documents. The process includes digitisation, arrangement and preparation of the results. ‘ePuzzler’ software analyzes various features of the fragments (contours, colour of the paper, handwriting, linearization) and arranges the scanned fragments of the documents into the pages and, subsequently, into the archival units. During digitisation the image of the fragments is created and all recognized information useful for further preparation is transferred. The images of the fragments of a specific unit of the preparation are uploaded to ePuzzler software and afterwards they are arranged according to the strategy of the binary tree. The fragments may display a significant diversification within their features, consequently the variance of the number of all fragments is extremely huge. Reconstructions are checked taking into account accuracy and corrected. At the end of preparation of a particular unit all reconstructions are subject to the manual process of quality assurance. After its completion all reconstructions are automatically converted to the PDF/A archivization format by ePuzzler.