Germany's Register Modernisation Enables Cross‑Agency Data Exchange

Germany is implementing the Register Modernisation (RegMo) programme to allow authorities to share data about millions of citizens, eliminating the need for individuals to repeatedly submit the same information to different offices. The system operates on two legally distinct layers. The first, the Identity Retrieval (IDA) procedure, uses the Identification Number Act (IDNrG) to obtain a unique ID number from the Federal Office of Administration (BVA). The second layer is governed by the NOOTS treaty, which enables the National Once‑Only‑Technical‑System (NOOTS) to exchange concrete proofs between registers using the ID number as a linking key.

The experience report, produced by virtual7 GmbH, outlines technical challenges such as ensuring accurate person identification, data protection compliance, and system integration. It aims to share lessons learned so future connections can be built more quickly and avoid repeating past mistakes.