Founded in 1991 and part of the Aareon Group, Diagonal Service GmbH is a registered debt collection agency based in Nuremberg, Germany. The company provides a comprehensive suite of services focused on managing the entire commercial dunning process for its clients, from invoicing and credit checks to fiduciary debt collection and legal enforcement. Their mission is to secure the liquidity of their clients by optimizing payment flows and minimizing defaults, primarily serving industries such as e-commerce, real estate, energy, and telecommunications.

Founded in

Germany