Can the insured capital of the Gadget Insurance be higher or lower than the value stated on the receipt?

The insured capital can be higher when the value of purchase does not match the value as a new device applied by commercial campaings, points swap or other commercial initiatives from the selling company. The documents must state these situations. The insured capital can't be lower than the one stated in the receipt. In both cases, is should be stated that the value to be insured must correspond to the replacement value of the insured device for another device that is new and identical.