I have received a ticket for a (minor) infraction the City of Montréal is alleging I have committed.

I haven't, for the simple reason that I was not in Canada on the day of the alleged event. Based on this, I have contested the ticket. But now the Crown prosecutor wants to see proof of me being away from Canada.

This event dates back over 12 months (behold the speed at which city bureaucracy moves) and I no longer have the boarding pass stub of my flight out of Canada. I have a ticket receipt, but of course one can buy a ticket and then cancel / change it or simply no-show, so not sure how strong that proof is.

I left YUL on a direct flight to Europe, and there is no exit stamp in my Canadian passport and no entry stamp on my European passport.

I found a CBSA service to demand a travel history, but it seems to only collect land exits from Canada, so wouldn't apply.

Does anybody know of a source from which I can get proof of having left Canada by air on a given date? Thanks.