Keep the message proportionate
Use the shortest explanation that still tells the truth about the event, impact, and current position. For a message about how to decline a request for a professional referral, use this factual base: acknowledge what was requested, any real timing issue, and whether your answer applies only now or more broadly.
Give timing that can be trusted
Give a realistic date, a simple option, or a direct yes-or-no question and avoid vague promises such as soon. Give a direct no, a limited alternative only if you mean it, and any practical information they still need. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Close the loop without drama
Do not overexplain private details, blame another person, or say maybe when the answer is no. When pressure, coercion, or retaliation is possible, use a safer channel and involve appropriate support. A calm ending is more credible than a warning, a grand gesture, or language designed to provoke a response.