On December 14th, Prof. Dr. Christoph Sorge, as an invited expert in the German Bundestag's Committee on Home Affairs and the Homeland Security, criticized the introduction of the tax ID as a general personal identification number as a part of the Register Modernization Act. As a general personal identification number, he assessed the introduction to be unconstitutional and the protective measures provided to be deficient.

Prof. Dr. Sorge pointed out alternative models with area-specific identifiers to the committee.

The full session of the Committee on Home Affairs and the Homeland Security including the public hearing can be found here.

Shortly before, the Friedrich Naumann Foundation for Freedom had published an expert report by Prof. Sorge, Prof. Dr. von Lucke (University of Friedrichshafen) and Prof. Dr. Spiecker called Döhmann (University of Frankfurt) on the topic. The full expert report can be found here.