This excerpt taken from the DT 6-K filed Mar 18, 2005.
New Billing & Collection unit. The former Billing Services and Customer Accounting offices joined forces to form the shared service unit Billing & Collection in May 2004. The new unit develops and operates full-service billing and receivables management solutions for all companies within the Group that offer commercial services to the market. Collaboration with SAF Forderungsmanagement GmbH and SolvenTec GmbH adds credit rating and collection services to round off the services portfolio. As of the 2005 financial year, the entire portfolio will be integrated in the new Business Customers SBA and operate under the T-Systems brand. Billing & Collection and T-Systems have started to join forces in the Business Process for Outsourcing(BPO) as early as the end of 2003, also on the external market.