What reasons can I give when I refuse an app order, and does the customer see them?

Four: kitchen too busy, something has run out, closing early, or other. We pass the reason to the app in its own wording, and the order is cancelled on your board at the same moment. What the app shows its customer is up to the app. Refusing from the kitchen screen offers the same four. The Orders from delivery apps tab in the docs explains refusals.