Not necessary for Panasonic, that's my personal experience. Just give your particulars at the service centre, they locate your purchase record and process your request accordingly. They don't ask for receipt.In sg, you need to keep a copy of the receipt to claim warrenty. It is hard for Courts to check their records unless you are their member. Do u know that Mi Tv has no warranty and no service centre here? If unluckily the tv is faulty after 1 or 2 mths then what can be done? No warranty.