B1
an official document that gives details to show that something is true
Dictionary examples:
My boss gave me a certificate for not falling asleep in meetings. (0.0)
I got a certificate for being the fastest texter in my family. (0.0)
I got a certificate for being the best nap-taker in my office. (0.0)
a birth/marriage/death certificate (24.8)
a doctor's/medical certificate (27.9)