Ask HN: What credentials have you gotten for fun?

I'll start. So far I've gotten my Wilderness First Aid and Wilderness First Responder certification.

I've looked into getting CEFR certification in German or studying for the HSK (Mandarin), but haven't put my money where my mouth is yet.

In the UK you can do the test to become a drone operator

https://register-drones.caa.co.uk/individual/register-and-ta...

Mail-order minister registrations are still popular, but not exactly skill-based https://wanderlustbay.com/best-place-to-get-ordained/

https://www.classcentral.com/report/free-certificates/

None. I gain skills for fun, but not credentials. The only purpose credentials serve is to prove to strangers that you have certain skills, so they're just business.

You can become a notary. The fees are small. It's a conversation starter and can be handy in a small business.