As with the date of birth, there are different formats for postal codes around the world. Please make sure you have tried all possible combinations of your zip code. By this we mean spaces, upper/lower case letters or hyphens as well as possibly long formats or formats that are unusual in everyday life. Please also try postcodes in your immediate vicinity. As soon as you have registered, you can change them again. If all else fails, please contact us and tell us your zip code so we can help you register.