Just to add to the thread, somehow, I've bought a stolen item. Bought this item in Nov last year and I just realised this yesterday when trying to service the item. I was told by the service centre that the item was reported stolen, so what I did to cover my ass is to report to the police and get in touch with the rightful owner. The item has been returned back to the rightful owner today .. exactly a year since it was reported stolen .. so chances to get your item back is quite high if you:

1. Report the stolen item to the police, they wouldn't do anything but you need this to pass it over to the customer service.
2. Report the stolen item to the company's customer service.

Yes, you need to have serial number .. most company will ask for serial number before opening any service ticket.

Lesson learned to me .. DO NO TRUST LOW YAT forumner BLINDLY... get receipt, proof of purchase etc when you buy something .. anything sold without the original box, user manual or incomplete accessories mostly are STOLEN GOODS/ITEMS.. BEWARE!!