The Central Registration and Identification System (CRiS) is the UK's national register of caravans.

[1][2] CRiS was launched in 1992 by the National Caravan Council (NCC) in conjunction with Hire Purchase Information (HPI) in an effort to prevent caravan theft.

[2] Since launch, all NCC member caravan manufacturers assign each new caravan a 17 digit Vehicle Identification Number (VIN) with the number etched into the side windows of the vehicle, and stamped into the chassis.

[1][2] CRiS also introduced the supplementary VIN CHIP upgrade kit which adds a scannable QR code sticker, tamper-evident window stickers bearing the VIN of the vehicle, and an RFID tag which is placed anywhere in the vehicle and can be read by law enforcement by a scanner.

For example, the VIN SGBS000BYA1234567 can be broken down as follows: Where manufacturer codes are defined as follows: and where year of build codes are defined as: After 2021, the letters roll over back to N, and thus N-Y denote each year from 2022 to 2030.