Haha, reminds me of a few months ago I was screened by a CBSA officer after landing, in a make shift stand they set up (so not the regular booths and desks), so even though she said I wasn’t selected for random testing, I asked to submit my proof of recovery just in case they later decide to select me retroactively (which happened to me before ), so she said “what am I gonna do with that?”. I said “pass it to the PHAC” so she said “How am I gonna do that?”. So I gave up. But maybe it’s possible to upload it into ArriveCan together with the vaccination proof ?