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Maybe you are referring to Stasi documents: https://www.stasi-unterlagen-archiv.de/en/archives/the-reconstruction-of-torn-documents/ https://www.stasi-unterlage

• 0cf8612b2e1e 3y ago
  In case people do not click the link In the 1990s, the Stasi Records Archive began reassembling documents that had been torn up by hand by the staff of the Ministry for State Security (MfS). This material had been stuffed into a total of 16,000 bags.1.7 million pages from 600 bags have been manually reconstructed, indexed and archived. Additionally, as part of a pilot project, a computer-assisted reconstruction program reassembled approximately 91,000 pages from 23 bags.