First, the notification of acceptance of the patent application will usually be sent to your mailing address within two weeks, and you do not need to pick it up yourself.
Second, you can call the Patent Office to check.
Third, if the acceptance notice is lost, it will not be replaced.
Getting the acceptance notice only means that the Intellectual Property Office has accepted the patent application.
About three months after receiving the acceptance notice, there will be an authorization notice and a notice to pay the registration fee.
The certificate will be issued in about 2 months and the whole process will take about 4 to 6 months