When a hostile message lands in your inbox, the urge to defend yourself, correct the record, or vent your frustration is enormous. It's also exactly what high-conflict communication is designed to provoke. The BIFF method, developed by Bill Eddy of the High Conflict Institute, is a deliberate alternative — a framework for replies that protect your boundaries, your time, and your court record all at once.
What BIFF stands for
BIFF is an acronym for Brief, Informative, Friendly, and Firm. Each element is doing specific work:
- Brief — keep replies short. Long messages give the other party more material to misinterpret, twist, or attack.
- Informative — answer the practical question, share the relevant fact, or confirm the schedule. No editorial.
- Friendly — open and close with neutral, civil language. Not warm. Not affectionate. Civil.
- Firm — close the loop. End the conversation cleanly so you're not pulled into a back-and-forth.
Done well, a BIFF reply should feel almost boring to write. That's the point.
Why BIFF works
High-conflict communication thrives on emotion, ambiguity, and escalation. BIFF starves all three. By staying brief, you don't hand over leverage. By staying informative, you keep the focus on logistics. By staying friendly, you don't give the other person a quotable hostile line. By staying firm, you stop the conversation before it spirals.
There's also a record-keeping benefit. Family court judges read messages chronologically. A pattern of BIFF replies — calm, factual, repeated — is one of the most credible things you can put in front of a custody evaluator. It tells a clear story: one parent escalates, the other parent stays composed.
BIFF in action
Compare the same situation answered two ways.
The hostile incoming message
“I can't believe you're trying to keep the kids from me again. You're poisoning them against me and you know it. Why are you like this? My lawyer is going to hear about this.”
The reactive reply (don't do this)
“I am NOT keeping them from you. You're the one who didn't show up last weekend! How dare you accuse me of poisoning them when you're the one who screams at them. Tell your lawyer whatever you want, I have the texts to prove everything.”
The BIFF reply (do this)
“Hi — the parenting time schedule is unchanged. Pickup is Friday at 6 PM as agreed. Looking forward to a smooth handoff.”
The BIFF reply doesn't engage with the accusation, doesn't defend, and doesn't escalate. It states the operational fact. The whole thing is two sentences. If the message is later printed for court, it reads as the calm parent's response to an unprovoked attack.
Tips for staying calm enough to write a BIFF reply
The hardest part of BIFF is writing it when your heart is racing. A few practices help:
- Wait before replying. If the other party isn't waiting on you for a child handoff or medical decision, give yourself an hour. Sometimes overnight.
- Draft first, send later. Type out everything you want to say. Then delete it and write the BIFF version. The first draft was for you; the second is for the record.
- Read your draft as if a judge is reading it. Would they describe it as composed and reasonable? If not, edit.
- Strip emotion words. "Frustrating," "ridiculous," "unfair," "you always" — none of these belong in a BIFF reply.
- End with a closer. "Thanks," or "Looking forward to it," or simply your name. A definitive close discourages back-and-forth.
When BIFF isn't enough on its own
BIFF is a communication framework, not a complete strategy. Sometimes the right move is no reply at all. Sometimes you need to consult your attorney first. And sometimes you need to escalate to a parenting coordinator or the court. BIFF is the default for routine, day-to-day messaging — the thousand small exchanges that make up most co-parenting.
How CoParent Shield generates BIFF-aligned replies
CoParent Shield's response suggestions are explicitly modeled on BIFF. When you paste a hostile or manipulative message into the analyzer, it returns one or more suggested replies that hit all four notes — brief, informative, friendly, firm — without sacrificing your position on the underlying issue. You can adjust tone, copy and paste, or use the suggestion as a starting point.
The goal is not to "win" the message. It's to stay out of the spiral, protect your time, and leave a clean paper trail. BIFF, applied consistently over months, is one of the most underrated forms of co-parenting protection there is.