There are two ways for a registrant's name, address or other registered items to apply for trademark change: 1. Entrust a nationally recognized trademark agency to handle it. 2. The applicant shall go directly to the trademark registration hall of the Trademark Office. The application document to be provided for trademark change is 1. If it is necessary to change the name or address, an application form for the name/address of the trademark change applicant/registrant shall be filled in. If the trademark registrant or the applicant applies for changing the name and address at the same time, they only need to fill in an application form. 2. When going through the alteration formalities, each trademark shall fill in the application for alteration and affix the seal of the applicant. 3. Where a trademark agency is entrusted, in addition to the application, a power of attorney for trademark agency, a copy of the applicant's business license or ID card shall also be submitted. 4. To apply for changing the name of the registrant, a certificate of change issued by the registration authority shall also be submitted. If the registrant is an enterprise, it shall issue a certificate of change from the registration department of the administrative department for industry and commerce. If the registrant is a public institution, it shall issue a certificate of change of the registration authority of the public institution; if the registrant is a natural person, it shall issue a certificate of change of the local police station. The name before change and the name after change on the certificate shall be consistent with the name before change and the name of the applicant on the application. It takes about 6 months to complete the trademark change, and the whole process is divided into application, review, announcement and issuance of change certificates.