When someone assigns a lawyer to represent him or her, what do we call this document/certificate/letter/paper? Is it power of attorney? Procuration?
Let me explain the context in the following example: I am a judge and there is a lawyer who wants to represent a client. I ask the lawyer to present something that proofs he has the right or power to do so.
So, what shall I, as a judge, ask the lawyer to provide to allow him or her to represent a client?
I hope I have made it clear.