People have won with and without a heading for the postcard. I address it to Disney Dreams Giveaway and then the P.O Box, etc. I have won a pair of ears. Others just do the address without a heading, people have also won using year of a million dreams as their headingas well. I am guessing it doesn't matter. I just use the Disney Dreams Giveaway because it makes it easier (in my opinion) for the post office readers to read the address, and it is the suggested heading in the rules for the United Kingdom. You should be fine whatever you decide.