What should I do with award certificates? I recently won the "Best Student Paper" award at a moderately significant conference in my field (subfield of CS).
This came with a Trophy and a Certificate.
The trophy  I will put in the corner of my the lab, and use for motivation.
But I don't know what to do with the certificate.

What should I be doing with the certificate?
Do I need to save it to prove to someone later my paper did actually get the award? Surely they can look it up online.

I am generally opposed to the hoarding of documents -- I strive to minimise the number of physical possessions I have.

So I was kinda thinking of just using it as scrap paper...
Give it to a relative (parent, spouse?). My mother has a "wall of Sergio" in the house where she displays different types of significant awards, letters, etc. I think it's a little weird, but giving them these awards is a nice way to let them have a handy reminder of what you're up to at the time, and parents certainly appreciate it sometimes. My mother and I came from not very much at all, so she is so happy to hear I am doing something with my life -- maybe your family may feel the same.