I would like to ask why I found unpaid information in the Intellectual Property Office, including stamp duty and annual fee for the second year, but I didn't receive the authorization notice.

Hello.

Where an application for a patent for utility model or design has undergone a preliminary examination and an application for a patent for invention has undergone a substantive examination, and no reason for rejection has been found, the Patent Office shall issue a notice of authorization and a notice of registration. After receiving the authorization notice and registration notice, the applicant shall go through the registration formalities and pay the prescribed fees in accordance with the requirements of the notice within 2 months. If the registration formalities are overdue and the prescribed fees are paid, the Patent Office will grant the patent right, issue a patent certificate, record it in the patent register and announce it in the patent gazette, and the patent right will take effect as of the date of announcement.

You can check the basic information to see if there is authorization status, or wait.