The jurisdiction and arbitration clauses contained in consumer contracts can significantly limit the constitutional right of consumers to have recourse to the courts for protecting their rights. This particularly applies if such a clause is contained in the standard terms of the contract prepared by the other party, as a result of which the consumer cannot influence the substance of the contract. In such cases, the consumer has in fact been forced to agree that the disputes arising from the contract will be settled in the arbitral tribunal or court chosen by the seller or supplier if the consumer wishes to acquire the desired goods or service. However, such contracts are relatively frequent in the practice of the European countries, which has given rise to the judgements of the European Court of Justice such as Oceano Grupo ^*1 , Mostaza Claro ^*2 , Asturcom ^*3 , Pannon ^*4 and Pénzügyi Lízing . ^*5