In the letter I received, it said to send everything via the case-specific enquiry form so I did just that. It said "Please send the requested information/documents and all future inquires with respect to your application via the case-specific enquiry form at the following link" and then they gave the link to the site. I managed to squeeze in all the proof I could until it said there was no more space. I put everything I could possibly thing of so I just hope it's enough. In the letters we had the 3 people write they are people that see us in person all the time so they're literally eye witness accounts that I'm present in Canada. I also submitted recent bank statements/internet bills too and lots of receipts of stuff being sent to me with my name and address on it.Hi, did you submit through webform? Let me know how it goes as I am also gathering an additional proofs to submit soon. Goodluck!