Deutsche Bank has come under fire for weaknesses in its procedures in identifying clients to prevent money laundering and the financing of extremists.
The June deadline was imposed when watchdog BaFin announced in September that it had ordered the lender to do more to prevent money laundering, without giving details. It said it had appointed a third party, KPMG, to assess progress.
Handelsblatt first reported the requirement earlier on Wednesday.
Deutsche Bank declined to comment.
The customers will be re-evaluated under the terms of a new money laundering directive. The bank will have another year or more to examine the status of less risky customers.
(Reporting by Hans Seidenstuecker; Writing by Tom Sims; Editing by Kathrin Jones and Jan Harvey)
