What documents to bring when delivery

This is my 1st pregnancy. What documents do we need to being when going to delivery? IC and marriage cert? And is there such thing as pre admission letter or something? And for booking of wards, usually at which week do they ask us to make the booking ? Will they inform us of when to book or we need to OT OT go to the pre admission @KKH and register ? #firsttimemom #firstbaby