first of all, the font of a registered trademark changes, which is easy to cause disputes and is not conducive to the protection of trademark rights. Article 24 of the Trademark Law stipulates that if a registered trademark needs to change its logo, it shall re-apply for registration. Article 49 stipulates that if a trademark registrant changes the registered trademark, the registrant's name, address or other registered items by himself in the process of using the registered trademark, the local administrative department for industry and commerce shall order it to make corrections within a time limit; If it fails to make corrections within the time limit, its registered trademark shall be revoked by the Trademark Office. Among them, "changing the registered trademark by oneself" includes changing the font of the registered trademark. The above provisions mean that the use of a registered trademark should be strictly limited to the approved registered trademark pattern and the approved goods (services), and the registered mark should not be marked if the trademark pattern is changed or exceeds the approved goods, otherwise there will be the risk of impersonating another person's registered trademark; If the changed trademark pattern is the same as or similar to the registered trademark of others, it will bear the legal responsibility of trademark infringement. Therefore, a registered trademark should use whatever font it is and cannot be changed at will. Many registered trademark owners will change the font when using a registered trademark in order to make the trademark more beautiful and special. In this case, it is suggested that the trademark with changed font be re-registered as a new trademark. Secondly, under some special circumstances, the change of trademark font will not constitute a fake registered trademark, but a self-change, and you can choose whether to apply for registration of the changed trademark. For example, in some cases, the change of the font of a registered trademark does not constitute a substantial change in the font, and this change is minimal. For example, the font of a registered trademark and the font of a trademark in actual use are handwritten and printed. The law allows this to happen, so it is generally not treated as a counterfeit registered trademark. However, it is suggested that trademark owners should carefully consider and re-apply for registration of the trademark after changing the font. Thirdly, pay attention to the risk of "withdrawal". Paragraph 2 of Article 49 of the Trademark Law stipulates that any unit or individual may apply to the Trademark Office for cancellation of a registered trademark if it becomes the common name of the goods it has approved for use or if it is not used for three consecutive years without justifiable reasons. After the trademark with changed font is re-registered, it is actually two different registered trademarks from the previous registered trademark. Trademark owners should pay attention to the use of both trademarks before and after the change to prevent the risk of "withdrawal". Finally, the new trademark after the font change is used only without registration, and the trademark law will not protect it. To sum up, the trademark owner must not change the font of a registered trademark at will. If it is really necessary to change it, he should consider re-applying for registration.