a certification trademark refers to a mark that can prove that a commodity meets certain quality standards, also known as a "guarantee trademark". Some countries also call it "guarantee trademark" or "uniform quality mark". Usually, an authoritative chamber of commerce, organ or other organization applies for registration. The applicant has the ability to identify the goods using the certification trademark and bears the guarantee responsibility, which proves that the trademark right belongs to the applicant. Prove the significant difference between trademarks and other trademarks, that is, the separation of ownership and use rights. A certification trademark shall be registered by an organization with the ability to detect and supervise, and used by others other than the registrant. The purpose of using certification trademarks is to provide consumers with quality certificates, which is conducive to enterprises to expand the sales of products and enhance their competitiveness. At the same time, the use of certification marks is conducive to the protection of famous and famous products. Not all trademarks can be transferred, and there are restrictions on registered trademark transactions. For example, a collective trademark cannot be transferred, but it proves that the trademark can be transferred. At the time of assignment, the transferee shall provide the certification documents stipulated in Article 4 of the Measures for the Registration and Administration of Collective Trademarks and Certification Trademarks, which shall be examined by the Trademark Office, announced after approval, and shall take effect as of the date of announcement. Article 4 of the Measures for the Registration and Administration of Collective Trademarks and Certification Trademarks: To apply for the registration of a collective trademark, the qualification certificate of the subject shall be attached and the names and addresses of the members of the collective organization shall be specified in detail; Where a geographical indication is used as a collective trademark to apply for registration, it shall be accompanied by the qualification certificate of the subject and shall specify in detail the professional and technical personnel and professional testing equipment it has or the institutions entrusted by it, so as to show that it has the ability to supervise the specific quality of the goods using the geographical indication. A group, association or other organization applying for registration of a geographical indication as a collective trademark shall be composed of members from the area marked by the geographical indication. Let's introduce several situations in which registered trademarks are not transferable: 1. Trademarks used for two similar goods cannot be transferred separately; 2. Joint trademarks cannot be transferred separately. 3. Trademarks belonging to * * * cannot be transferred by one owner without the consent of other * * * owners. 4. Trademarks that have been licensed to others shall not be transferred at will. 5, the transfer of a registered trademark fails to perform legal procedures, its transfer is invalid. To sum up, not all trademarks can be transferred, but it proves that trademarks can be transferred. When transferring a certification trademark, the transferee needs to prepare all the above materials in accordance with relevant regulations and apply to the Trademark Office. The Trademark Office will review the submitted materials and the actual situation, and will make an announcement after examination and approval. The transfer will take effect from the date of announcement.