In 1992, a document containing the names of roughly 4,500 people registered as unofficial collaborators with the Ministry for State Security (Stasi) in Halle caused significant uproar. For over thirty years, the authors behind this publication remained anonymous, but they have now spoken publicly about their actions. The list included clear and cover names, along with residential and operational locations of individuals who served as Unofficial Employees (IM) between 1986 and 1989. Unlike full-time staff, these informants were recruited to covertly gather information on people within their personal and professional circles.

The group responsible for the leak consisted of seven individuals who worked together in secret during long nights to transcribe the files. Five of them are featured in the ARD documentary "Der große Stasi-Leak." Key figures included Ulrich Schlademann, later head of the Halle branch of the Stasi Records Agency and a pastor; Leopoldina archivist Wieland Berg; environmental activist Matthias Waschitschka; Evangelical pastor Thea Ilse; and printing shop owner Henning Schaarschmidt. Many of these individuals had already collaborated in the 1980s within Halle's oppositional environmental movement, which targeted destruction in the Chemical Triangle and drew the attention of the state security apparatus.

Their activism included a notable 1989 action known as "Schauangeln" (show fishing) on World Environment Day. While disguised construction workers unfurled a banner reading "We have only borrowed this earth from our children" to highlight the biological death of the Saale river, police were distracted by protesters with signs at the riverbank. The following day, numerous participants were interrogated by the Stasi. After the fall of the Berlin Wall, several members of the group joined personnel commissions at the Martin-Luther-Universität Halle-Wittenberg to vet university staff for political ties to the former regime. They created the list to provide these commissions with an additional tool to accelerate the process of coming to terms with the past.

The document was distributed to approximately 30 ministries, parties, and newspapers. However, only the New Forum, a central representation of the civil rights movement during the peaceful revolution, made it publicly accessible in their offices. This decision turned the list into a major topic of conversation in the city, with people queuing for hours to view it and up to 700 appointments being scheduled in a single day. The list's preface noted that in rare cases, individuals were registered as IMs without active collaboration occurring. Joachim Gauck, the first Federal Commissioner for the Stasi Records, viewed the list critically but stated that his agency knew of no case where a person appeared on it without cause.

The publication triggered legal debates regarding the limits of public reckoning with the Stasi past versus the protection of individuals from premature judgment. Several affected parties filed civil lawsuits against the New Forum. In 1994, the Federal Court of Justice banned further public display of the list. Although the Federal Constitutional Court did not rule on the case again in 2000, it criticized lower courts for insufficiently considering the public interest in processing Stasi history and freedom of opinion. Thea Ilse emphasized that while the publication sparked necessary societal debate and raised questions about individual guilt, it was essential to follow one's conscience to prevent a return to dictatorship.

Sources: Tagesschau.