1. The trademark registration certificate is invalid. This type of situation generally refers to a registered trademark that has expired and no renewal application has been filed within the six-month extension period, or the registered trademark has stopped being used for three consecutive years; or the trademark has been canceled by the Trademark Office.

2. The transfer changes the text, graphics and combination of the registered trademark without authorization. Registered trademarks are approved and filed with the State Trademark Office, and users are not allowed to make changes without authorization. Registered trademarks that have been changed without authorization may not be transferred and are not protected by law.

3. Change the name, address, and other matters of the registrant without the approval of the relevant departments without completing the change procedures. The name and address of the registrant are unique and certain, and are an important basis for determining the owner of the exclusive right to a registered trademark, and cannot be changed at will. Any unauthorized changes are not protected by law.

4. Application for transfer of registered trademarks that may cause misunderstanding, confusion or other adverse effects. After long-term use, a registered trademark may have become well-known to the relevant public, and consumers may associate products with the same registered trademark. Confusion and misunderstanding are particularly likely to occur when a registered trademark is transferred. In order to protect the interests of consumers and avoid confusion and misunderstanding, the law stipulates that the Trademark Office will not approve an application for transfer of a registered trademark that may cause misunderstanding, confusion or other adverse effects, and will notify the applicant in writing and explain the reasons.

5. The trademark registrant does not transfer the same or similar trademarks registered on the same or similar goods. Identical or similar trademarks registered on the same or similar goods should be transferred together. Otherwise, it will easily cause confusion and misunderstanding to consumers, and the significance of protecting the exclusive rights of the trademark will be lost. Therefore, the law stipulates that identical or similar trademarks registered on the same or similar goods should be transferred together.