Ostensible authority
“What they eye don’t see, the chef gets away with.”
- ---- Terry, the head cook at Fawlty Towers
So when your counterparty - a legal fiction, after all, a conceptualized bunch of papers filed at companies house - signs your carefully crafted contract, it — for it is an it — signs through the agency of an individual: perhaps an employee, a director or someone operating under a Power of Attorney.
How can one be sure that a person who says they have such an authority really has it?