Wiktionary
n. A medical certificate.
Usage examples of "doctor's certificate".
When the security drone made to wave her wand over the Terminator's body, it presented its doctor's certificate claiming that several injuries had led to an implant.
When the security drone made to wave her wand over the Terminator's body, it presented its doctor's certificate claiming that several injuries had led to an implant because he had degenerative bone disease that had required the replacement of most of its joints with surgical-steel replacements.
I didn't know that Westchester required a doctor's certificate in a hold-up case.
He won't even want to see a doctor's certificate saying I'm HIV-negative.
Isobel had advised Anna to get a doctor's certificate saying she couldn't take part, she remembered now.
He's trying to get out of it with a doctor's certificate and a letter from Opekta.