If the trademark agent cannot be found, you can first check the status of your trademark through the application number, because all trademark materials must be sent to the agency. Therefore, you need to contact a new and reliable agency first, and entrust your trademark agency to the Trademark Office to make changes. Then the address and contact person need to be changed, otherwise you will not be able to receive all certificates in the future.

You must refer to several trademark agencies to find one that is reliable and has a good reputation, otherwise the follow-up matters will be quite troublesome.