When asking information it is always required to keep in mind for what purpose information required.If certainly to produce in judicial proceeding better to ask certified copies.In fact I have received certified copies when asked for.Moreover if copies of notings etc too if not certified certainly it carries a forwarding letter of
PIO in original and same shall serve its purpose without any difficulties.Moreover if opposite party casts a question on veracity of such documents produced in xerox ,court may be asked to summon the persons keeping them or get from them confirmation as in no case original is the property of the party producing them