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Found Compass Card
(lemmy.ca)
You can also turn it in to a TransLink employee or drop it off. It should make its way to the owner if it's registered, else go to charity?
https://www.translink.ca/about-us/customer-service/lost-and-found
If the owner had/has the numbers and a compass account attached to it, they can cancel it themselves and transfer the money off of it onto their new one. I think if they had that info they probably would've done this already so I doubt it's registered.
Community for the city of Vancouver, BC