Revolut Travel Insurance Certificate for border crossing

Hi all,

I looked around but could not find any information about the topic.
I need Travel Insurance to visit a country and at the border/customs the Insurance must be presented.

When activating Revolut Travel Insurance is there some sort of document/certificate sent by email so that can be shown at the border crossing/visa issuing?

As far as I understood, the insurance gets active when the app location realizes that you are abroad.
This requires two things: Internet on the mobile phone and being already in the country.
Both are not usually feasible while crossing a border…

Does anybody have an idea how should this work?

Thank you!