In his complaint made to the Parliament Street police station, he claimed that the Lok Sabha Secretariat, in a reply to Central Information Commission, had accepted that the signatures on the questions allegedly submitted by him were forged.
Singh alleged that a person had forged his signatures on the questions submitted in 2005 and requested police to find the person who had done so.
The complaint is being looked into, said a senior police officer.
Meanwhile, Lok Sabha Secretariat sources said that the decision on the issue was taken by a parliamentary committee and therefore it was a closed chapter.