Samsung blast water damage sticker completely white except for tiny corner?

They can charge you for the phone, it depends who receives the phone and how the person whats to do. If you ever damage the water mark you can always buy them of eBAY OR CELLULAR DR. If you don't want to get charge for it you can order a water mark of ebay or a cellular repair shop place online or you can remove the one that is on it's way to your house. Remove it very carefully with a razor blade and use a heat gun to make the glue less tacky. Be careful