You have to wait until your application is essentially processed again. Processing times for PGP is around 3 years so there will be long periods of time where you hear nothing.
Good news...I received an email on Friday evening from CIC after submitting my comment here. I think it's an AOR.
It says "This letter confirms that your Application to Sponsor a Member of the Family Class was received
by Immigration, Refugees and Citizenship Canada (IRCC) at the Case Processing Centre in
Mississauga on behalf of the following family member(s):"
It only has my father's name. He is the principal applicant of this application and my mother is his dependent, probably that's why right?
Any idea how long it takes usually to get the medical request after the AOR?
They also mentioned: "Please note that the following documentation will be required for your sponsorship
application to determine whether you meet the minimum necessary income requirements to
sponsor a parent or grandparent. In order to minimize processing delays, if not already included
in your application, please obtain and submit as soon as possible:
A completed and signed authorization form – IMM 5768 - Financial Evaluation for Parents
and Grandparents Sponsorship providing your Social Insurance Number."
I already submitted form 5768 with my original application in November, I don't have to do anything right now, just wait for the next step right?