Kingdom of Loathing Certificate of Participation
From A KoL Wiki

Kingdom of Loathing Certificate of Participation
The Kingdom of Loathing Certificate of Participation is a furnishing located at your Campground.
When "Used"
Your Kingdom of Loathing Certificate of Participation hangs proudly, declaring to all who view it that you are, indeed, a participant in the Kingdom of Loathing. Go, you!
Shiny Certificate
It is possible to obtain a shiny version of this certificate, using it gives the folowing message:

Your Kingdom of Loathing Certificate of Participation hangs proudly, declaring to all who view it that you are, indeed, a participant in the Kingdom of Loathing. Go, you!
It's shiny because you've been to one of the official KoL Conventions.
Notes
- The original Kingdom of Loathing Certificate of Participation is obtained by using a Certificate of Participation, which is in turn obtained as a reward for having completed the Toot Oriole Quest.
- The Kingdom of Loathing Certificate of Participation is not affected by ascension; you do not have to re-obtain it in your next incarnation.
- If you don't use your certificate before ascension then you will find you have one at your campground after ascending anyway.
- Any player that visited a now removed test page also received the Shiny Certificate. However, their shiny certificates have now been removed and their original certificates have been restored.