Gift certificates must be redeemed only on the WhiteWall website of the country where they were purchased and are not valid on other country-specific WhiteWall websites.
Gift certificates can only be used on the website of the country where the gift certificate was originally purchased. For example, if the gift certificate was ordered on the WhiteWall UK website, it must be redeemed on the WhiteWall UK website. The Gift Certificate would not be valid on any other WhiteWall country-specific website:
More information about the validity of the gift certificate can be found here.