Receive a return letter (notice of acceptance of trademark transfer application)": It means that the Trademark Office sends it to the agency through the post office, or the trademark registration applicant sends it by registered mail. Since the agency If the company or trademark registration applicant moves, or there is no one to accept it, the post office will return the registered letter of acceptance notice to the registration hall of the Trademark Office. Finally, the agency company or trademark registration applicant will go to the trademark registration hall to pick up the acceptance notice in person. . To put it bluntly, the current status of the acceptance notice is either in the hands of the agency or the trademark registration applicant, and is no longer in the hands of the Trademark Office.