The Movement Reference Number (MRN) is the registration and identification number of the customs authority. You can use this number to monitor the status of your shipment at any time. The MRN is displayed as an 18-digit number and letter string and as a barcode in the top right-hand corner of the export accompanying document that was sent to you by your customs office. Only with this number is the export procedure opened and the parcel ready for dispatch. No export certificate can be issued without the MRN.