On 10 November 1990 an article appeared in the newspaper vum Lëtzebuerger Vollek, which translates into "Five years of state secret – The bombing NATO terror commando" that caused a parliament inquiry in which Santer was forced to reveal the existence of a stay-behind army in Luxembourg and being politically responsible to call for its dissolution.

[3] On 17 December 1990 he told the constitutional committee the organisation had never more than 12 members and was only foreseen to handle intelligence operations, as well as escape and evasion manoeuvers.

Allegations of corruption concerning individual EU-commissioners led to an investigation into administrative failings (incompetence and malpractice) by a so-called Committee of Independent Experts.

Despite clearing most commissioners, the report stated that they had not found a single person showing the slightest sense of responsibility.

On Monday 23 January 2012, Jacques Santer was appointed to head the board of the Special Purpose Investment Vehicle (SPIV), which is designed to boost the firepower of the European Financial Stability Facility, the eurozone rescue fund.