Well, we sent them an email (CPC) with my PA's docs attached. I'm pretty sure they are the ones who forwarded our docs to Canadian Embassy Manila (CEM) because it was CEM who replied directly to us that docs have been received and attached to our file.
That's just based on my own experience. Try to read other threads in the forum. People give out the emails such as the one I mentioned before to help each other out. That's where I got it from, other threads, not just March 2017 outland... Other than that, I don't know what else to tell you.