Legal analysis: Whether a trademark transfer contract requires notarization can be divided into the following three situations: (1) If the transferor and the transferee are both companies, notarization is not required; (2) If the transferor is a company If the transferee is an individual or a company, notarization is not required; (3) If the transferee is an individual, notarization must be done.

Legal basis: "Trademark Law of the People's Republic of China" Article 47 A registered trademark declared invalid in accordance with the provisions of Articles 44 and 45 of this Law shall be registered by the Trademark Law The Bureau shall announce that the exclusive right to use the registered trademark shall be deemed to have ceased to exist from the beginning. Decisions or rulings declaring the registered trademark invalid, judgments, rulings, and mediation documents on trademark infringement cases made and executed by the People's Court before the invalidation, and decisions on handling trademark infringement cases made and executed by the industrial and commercial administration departments, as well as The executed trademark transfer or licensing contract does not have retroactive effect. However, compensation shall be provided for losses caused to others due to the bad faith of the trademark registrant. If the trademark infringement compensation, trademark transfer fees, and trademark usage fees are not returned in accordance with the provisions of the preceding paragraph, which obviously violates the principle of fairness, all or part of the compensation shall be returned.