Trademark requirements in Brazil include that marks be visually perceptive and distinctive, with no need to show intent to use. Foreign entities must retain a properly qualified Brazilian attorney. Slogans and personal names cannot be registered as trademarks. Well-known marks receive protection even if unregistered, while high renown marks receive special protection across all industries. Evidence like market surveys and trademark usage data can prove a mark is well-known. Applicants should conduct trademark searches, file broad specifications, and emphasize principles of trademark law before the Brazilian Patent and Trademark Office.