Old Passport Copy Requested for I485 Filing

Hi Everyone

This is my first post here. One of my close relatives is filing for I485 , he has last 2 year passports which had VISA stamp but I believe he was asked to submit all the old copies of passport. Is it really needed (submission of all old passports , even if they have expired)? The old passport does not have any VISA stamped and was never used for any international travel