Si tu a changé de CB, ou d'adresse, tu effectues les changements, sinon tu n'a pas besoin de faire quoi que ce soit.
Je cite, Cybereality :
Just to clarify, if your information has not changed, then you don't have to do anything. The page is for people that have new credit cards or shipping details. For example, if your credit card expired or was lost. Also, if you moved shipping addresses. Otherwise you guys should be good to go.