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In the event of a dispute or conflict, the consumer can resort to Alternative Consumer Dispute Resolution (commonly known as RAL), which covers mediation, conciliation and arbitration.
You can consult the list of entities here https://www.consumidor.gov.pt/parceiros/sistema-de-defesa-do-consumidor/entidades-de-resolucao-alternativa-de-litigios-de-consumo/ral-mapa -e-list-of-entities.aspx
More information on the Consumer Portal www.consumidor.gov.pt