the código brasileiro de defensa do consumidor (consumer protection code - cdc) is a legislation, depicted by a set of rules with a purpose of protecting and defending customers rights as a consumer, as well as establishing standard policies across all stores in the state.

procon carioca is a government organization that protects the rights of consumers in rio de janeiro - they provide up-to-date news and legislation on their website, and contact information for filing complaints. 

hoping to act as a support network in the city, procon carioca gives consumers a great deal of information about the various different companies operating within rio, as well as access to the complaints about any establishment - more information on this page, or via i-tunes here.