If your undertaking application is accepted, a Certificat de sélection du Québec (CSQ – Québec Selection Certificate) will be issued to the person you are sponsoring.
The decision of Ministère de l’Immigration, de la Francisation et de l’Intégration will be forwarded directly to the Canadian visa office covering the sponsored person’s country. The person you are sponsoring can then apply for permanent residence.
I am 20, Aug 2018 applicant, I have received CSQ for 1 year, I never received an email requesting to send the CSQ, and there is no updates for a long time after medical exam has been accepted, so i was wondering whether it's mandatory to send CSQ to IRCC or not.