I wonder what do you normally call someone who has been granted the full authority to do all legal affairs and decision makings on behalf of "someone else" or "an organization" in AE?
I have two options here, but I don't have any idea whether they might differ in some legal / semantic aspects or not. Also, I don't know if they are some fixed terms or kind of translations from other languages which cannot be considered as natural English!
- Authoritative representative
- Plenipotentiary representative
Please kindly enlighten me.