If you don't have the physical device, you can still retrieve the serial number through your digital records: Check your Microsoft warranty and create service orders
Eject the SIM card tray; the number is printed on the inside of the tray. microsoft surface serial number lookup
The serial number of a Microsoft Surface device is a unique 12-character string (typically a combination of letters and numbers) that identifies your specific device. Looking it up is essential for: If you don't have the physical device, you