The use of trademarks can not only be used by oneself, but also authorized to be used by others, because trademarks have extremely special value. However, authorizing others to use a trademark requires signing an authorization letter. How long is the validity period of a general authorization letter? Then, let me provide you with knowledge about how long a general authorization letter is valid for your reference! 1. General authorization How long is the validity period of the certificate? When the trademark owner authorizes others to use the registered trademark, the authorization period is determined by negotiation between the trademark owner and the authorized person, and the authorization period generally cannot exceed the validity period of the trademark. Article 39 of the "People's Republic of China and Civil Code" The validity period of a registered trademark is ten years, calculated from the date of approval of registration. Article 40 If a registered trademark expires and needs to be continued to be used, the trademark registrant shall go through the renewal procedures in accordance with the regulations within twelve months before expiration; if it fails to do so during this period, a six-month extension period may be granted . Each renewal of registration is valid for ten years, starting from the day after the expiration of the previous term of validity of the trademark. If renewal procedures are not completed upon expiration, the registered trademark will be cancelled. The Trademark Office shall announce the renewal of registered trademarks. Article 43 A trademark registrant may authorize others to use its registered trademark by signing a trademark license contract. The licensor shall supervise the quality of the goods used by the licensee using its registered trademark. The licensee shall ensure the quality of the goods using the registered trademark. If the registered trademark of another person is used with permission, the name of the licensee and the place of origin of the goods must be marked on the goods using the registered trademark. If the licensor permits others to use its registered trademark, the licensor shall submit its trademark use license to the Trademark Office for record, and the Trademark Office shall announce it. The trademark use license shall not be used against bona fide third parties without registration. 2. What is the process of trademark licensing filing? 1. Prepare trademark licensing filing materials (1) Subject qualification certification documents of both the licensor and the licensee (both parties provide a business license for the company, the licensor provides an ID card for the individual, and the licensee If you are an individual, you must provide an individual industrial and commercial business license in addition to your ID card); (2) Application documents: Application for registration of trademark license contract, power of attorney (issued when applying through an agency); (3) Trademark registration certificate; (4) A trademark license contract signed/sealed by both parties. If the contract is in a foreign language, a Chinese translation must be attached. The contract must clearly state the permission to use the trademark, the products/services used and the period of use, etc. 2. Submit the application to the Trademark Office; 3. Review it with the Trademark Office; 4. If it passes the review, a "Trademark License Contract Filing Notice" will be issued. 3. Responsibilities for unauthorized use of other people’s trademarks Penalties for unauthorized use of other people’s trademarks: If the industrial and commercial administrative department determines that the infringement is established, it shall be ordered to immediately stop the infringement, confiscate and destroy the infringing goods and those mainly used to manufacture infringing goods, and forge registration For tools marked with trademarks, if the illegal business volume exceeds 50,000 yuan, a fine of not more than five times the illegal business volume may be imposed; if there is no illegal business volume or the illegal business volume is less than 50,000 yuan, a fine of not more than 250,000 yuan may be imposed. The law is based on Article 61 of the Trademark Law. The industrial and commercial administrative department has the right to investigate and deal with any infringement of the exclusive right to use a registered trademark; if a crime is suspected, it should be promptly transferred to the judicial authorities for handling in accordance with the law. The above is the legal knowledge I compiled and collected about how long a general power of attorney is valid. A general power of attorney is valid for ten years. You can determine the validity period of the power of attorney based on the validity period of the trademark, which can better protect your own interests.