Selling an Apple Watch

Branta_uk wrote:

If you purchased the device from Dubai Duty Free you know it is not stolen. You should be able to check the warranty status and expiry date by entering the serial number into https://checkcoverage.apple.com/

Good point.

If you purchased the device from Dubai Duty Free you know it is not stolen. You should be able to check the warranty status and expiry date by entering the serial number into https://checkcoverage.apple.com/

Why do you need to prove it is yours?

If you are selling it, just unpair it from your iPhone, and erase it.

See here: How to prepare your apple for watch sale - iMore.com

and here: Unpair and erase your Apple Watch - Apple Support

Still no need to prove it belongs to anybody.

If it still has any warranty left, it can be used by anyone in possession of the device. No proof is needed to make use of warranty service. Warranty is tied to the device, not the person.

No. There is no database of stolen watches.