All fields marked with an asterisk are required, so it is necessary to make sure they are filled in correctly. The password must be at least 8 characters long, it must contain at least one lowercase letter (e.g. a, b, etc.), one uppercase letter (e.g. A, B, etc.), one digit (e.g. 1, 2, etc.) and one special character (e.g. $, #, @, ! etc.). The VAT, which is marked with two asterisks, is not mandatory if you are a private person.