The serial number is an 11 digit number shown on the barcode label (entitled SN1 for recent products), located on the back of the product packaging.
This number also figures on the receiver unit of your device.
If necessary, you can call us on this number: +33 (0)3 27 64 97 71 (Monday to Thursday, from 8 am to noon and from 1pm to 4.30 pm; Friday from 8 am to noon)