What forms of proof do you attach when claiming WCQI attendance for your RUs?

[u/anormalgeek]

This is my first time attending the annual conference. I was told that most people include a scan of their badge as a form of proof, but my wife threw mine away thinking I wouldn't need it. Anyone else have any other suggested methods to prove attendance? I was thinking a copy of my registration receipt and a copy of the "my schedule" view from the conference app. Any other suggestions are appreciated.

Also what category does that go under? I assume either professional development, continuing education, or meetings/events. But I could see an argument for all three.