Answer Trademark notarization is to ask the national notary office to issue a certificate of trademark transfer. The trademark holder declares in front of a notary that he voluntarily transfers the trademark to others and writes a statement. The notary office notarizes whether the statement is true and valid. With this notarial certificate, the Trademark Office will be more confident that the trademark transfer will be successful when reviewing the trademark transfer. If you still have questions, you can contact customer service directly. Buy a trademark