From 1992 most caravans in the UK were sold with a 17 digit CRiS number etched onto windows as well as a VIN or chassis number on the A frame or by the door.
From 2016 window etchings were replaced by tamper proof VIN Chip stickers placed on the inside of caravan windows and inside gas lockers.
For most UK caravans CRiS numbers begin with the letters ‘SG’.
Touring caravans manufactured before 1992 should have a plate on the A Frame or by the door – this should give the VIN or chassis number.
Folding campers and trailer tents should have a chassis number on the A frame also.