A full room is a question, not a wall
The owner's standing rule — refuse only for money; otherwise say what you see, ask once, and write down who said yes.
The account administrator was moving a family of three from one room to another and the system would not let them: the room took two. The owner's answer, verbatim, is now the product's rule: "You can show me it has three people — shall we allow or shall we not? If I say allow, then do it. Why are you making someone's life difficult? Keep a log."
The rule
- If the thing being asked for would make money wrong — an invoice edited, a closed month posted into, a payment deleted — the system refuses, in a sentence.
- Everything else is a question: an amber warning that says what it sees, one confirm, and a log entry with the login, the IP and the machine.
Where it applies
More people than the room takes. A move to a smaller category. A rate the desk names below the floor. A block on a room with a guest in it. A waiver at the door. Each says what it sees, asks once, and records the answer.
A refusal is written for the person at the desk, in the words they would use, and every one of them is in the manual — paste it into the search box and the page that explains it comes back.