Section 218(5) in Insolvency And Bankruptcy Code, 2016
(5)The Investigating Authority shall keep in its custody the books, registers, other documents and records seized under this section for such period not later than the conclusion of the investigation as it considers necessary and thereafter shall return the same to the concerned person from whose custody or power they were seized:Provided that the Investigating Authority may, before returning such books, registers, other documents and record as aforesaid, place identification marks on them or any part thereof.