Mate, I added my spouse 3 months ago (after AOR) and the IRCC sent me a form asking on my relationship history and requesting to send photos on different occasions , proof of communication and several other things which I mentioned earlier in this thread.Proof of communication? I think you are confused. That is by no means something you would have to submit when adding your spouse after AOR, that would be part of an spousal sponsorship application. A WHOLE different thing.
Two weeks after submission of this form, I received my spouse's biometric letter.