Former Chancellor Gerhard Schröder wants to leave the supervisory board of the Russian oil company Rosneft.
Schröder, who is the head of the Rosneft supervisory board, announced that it was impossible for him to extend his mandate on the board, the group announced on Friday.
Details were not given.
On Thursday, the budget committee in Berlin voted to close the former chancellor's office.
The approval of a corresponding application by the traffic light coalition is the culmination of the ostracism of the former SPD leader because of his ongoing ties to Russia.
For legal reasons, however, Schröder's relations with Russia and Putin were not used to justify the deletion of the office.
Rather, according to the traffic light application, financial support is made dependent on whether former top politicians actually still take on tasks.
It was said that Schröder no longer accepted any obligations from his time as Chancellor.
On Friday morning it became known that Schröder is having the decision to abolish his former chancellor privileges legally reviewed.
The lawyer Michael Nagel confirmed a corresponding report by "Spiegel" on Friday in Hanover.
Last year, more than 400,000 euros flowed from the state treasury for personnel expenses in Schröder's office.
According to the decision, the former chancellor is still entitled to a pension and personal protection.
Gerhard Schröder initially did not comment on the matter.