What does BIFF stand for?

Brief, Informative, Friendly, Firm. It is a widely used framework for replying to hostile or high-conflict messages without escalating.

Should I reply to every hostile message?

No. If a message contains no practical question and no decision is needed, silence is a valid and often the best response. Reply only to what actually requires an answer.

Is BIFF suitable when there are threats or violence?

No. If there are threats or violence, do not negotiate — contact the police and follow a safety plan. BIFF is for high-conflict words, not danger.

BIFF Communication: Responding to Hostile Messages

Separation and divorce generate hostile messages — accusations, sarcasm, demands, re-litigating old arguments. Every reply you send either cools the conflict or feeds it. The BIFF method — Brief, Informative, Friendly, Firm — is a widely used framework for responding to high-conflict communication in a way that protects you, keeps the record clean, and gives the other person nothing to escalate against. It is educational guidance, not legal advice.

Why it works: high-conflict messages are designed to provoke a reaction. BIFF removes the reaction. You reply with the minimum necessary information, in a neutral tone, holding your boundary — so there is nothing to attack and nothing to be quoted against you later.

The four parts

Brief

Two or three sentences. Long replies invite argument; every extra sentence is a new thing to dispute. Say what you need to say and stop. If a message does not need a reply, do not send one.

Informative

Give the one piece of information that actually matters — a date, a fact, a confirmation — with no opinion, no history lesson, no commentary on the other person's character.

Friendly

Neutral and courteous, not warm and not cold. "Thanks for letting me know." "I'll collect them at 5pm." Friendliness here is a tone, not an emotion — it denies the other person the fight they are fishing for.

Firm

State your position or boundary calmly and without apology, then end. Firm is not aggressive; it is simply not yielding where you have already decided. You do not have to justify a boundary.

Worked examples

Incoming: "You are impossible to deal with. You never tell me anything and you keep changing the schedule. I'm done playing games. You'd better sort yourself out."

BIFF reply: "The children will be with me from Friday 5pm to Sunday 6pm this weekend, as we agreed. I'll confirm the school run on Friday morning. Thank you."

Brief, factual, neutral, no engagement with the accusation.

Incoming: "You spent the whole marriage lying and now you expect me to just hand over money? Explain yourself."

BIFF reply: "Child support for this month was paid on the 1st as assessed. I'd rather keep our communication to arrangements for the children. Thank you."

Firm boundary — redirects to the practical topic and declines the argument.

Incoming: "Tell me right now what happened at school or I'm calling the police."

BIFF reply: "The school sent a note home on Tuesday; I've forwarded it to your email. You can contact the school directly for anything further. Thank you."

Informative and firm: gives the fact, points to the proper source, does not get drawn into a confrontation.

Rules that make BIFF work

Never reply in anger. Write it, wait, and edit before sending. A draft that sits for an hour loses its heat.
One topic per reply. Answer only the practical question; ignore the insults and the history.
Write for the record. Assume a judge or mediator will read it. A calm, factual reply is evidence in your favour; a sarcastic one is evidence against you.
Don't diagnose or label. No "you're a narcissist", no amateur psychology — it escalates and looks bad on paper.
Don't defend against every accusation. Most accusations don't need a reply. Answering them all keeps you in their arena.
Silence is a valid response. If a message contains no practical question and no decision needed, the best BIFF reply is none.

When not to use BIFF

Threats or violence: do not negotiate — report to the police and follow the safety plan. BIFF is for words, not danger.
Legal documents or demands: get professional advice; do not reply to a lawyer's letter with a BIFF message.
Genuine emergencies: be human and clear; BIFF is for routine high-conflict exchange, not a child's medical emergency.

Educational information only — not legal, psychological or safety advice. The BIFF framework is a communication method, not a legal strategy. Consult professionals for your circumstances.

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