Choice of law clauses are a central instrument for safeguarding party autonomy. At the same time, it must be ensured that consumers are protected and sufficiently informed, particularly with regard to the applicable law. The CJEU has established important principles in this regard in the Amazon decision. Based on the principles of choice of law in private international law, the article takes a closer look at the protection of the weaker party. The Amazon decision is placed in the system of private international law and justified by taking into account the various functions of information duties.