It’s 11:04 p.m. and your phone lights up. Three paragraphs from your ex, and somehow you’re responsible for the weather, the mortgage, and everything that’s gone wrong since 2019. Your thumbs are already moving. You have receipts. You have a numbered list. You are going to set the record straight.
Stop. Put the phone down. I say this with love and with nineteen years of professional risk assessment behind me: that reply you’re drafting is the single most expensive thing you’ll write this month.
Why the 'perfect comeback' always backfires
Here’s the reframe that changed everything for my clients — and for me, during my own eight-year high-conflict divorce: every message you send is either evidence for you or ammunition against you. There is no third category. Family court judges don’t read your texts for who was right. They read them for who sounds reasonable, stable, and child-focused — and who sounds volatile.
A high-conflict ex understands this instinctively. The hostile message isn’t really communication; it’s bait. The goal is a reaction they can screenshot. When you respond with three paragraphs of justified fury, you haven’t defended yourself — you’ve handed them Exhibit A.
What is the BIFF Method?
BIFF is a response framework developed by lawyer and therapist Bill Eddy of the High Conflict Institute, and it’s the gold standard for written communication with high-conflict people. Four letters, four rules:
Brief
Two to five sentences. Length is fuel — every extra sentence gives them something new to attack. Answer only what genuinely needs answering, which in most hostile messages is one small logistical fragment buried inside the aggression.
Informative
Friendly
Firm
End the exchange. State what will happen, once, without threats and without inviting a rebuttal. Firm is a closed door, not a slammed one.
BIFF in action: before and after
The incoming message: ‘You’re late AGAIN picking up Maya. You’ve never respected my time. Maybe if you were half as committed to your daughter as you are to your new life, this wouldn’t keep happening.’
The reactive reply: ‘Are you seriously lecturing ME about commitment? I was eight minutes late ONCE because of the 401. You’ve changed the schedule three times this month and I have every text. Stop rewriting history and stop using Maya to score points.’
Feel how satisfying that is? It’s also long, emotional, accusatory — and it makes both of you look like the problem. Now the BIFF version:
‘Thanks for your message. Pickup on Friday is 6:00 p.m. at the school, per the schedule. I’ll confirm by text if traffic causes any delay. See you then.’
Three sentences. Nothing to screenshot, nothing to escalate, nothing to explain to a lawyer at $350 an hour. If this exchange ever reaches a courtroom, one of you sounds like a stable co-parent. Make sure it’s you.
The four checks before you hit send
Run every reply through this sequence: Is it Brief? Is it Informative — facts only? Is it Friendly, or at least neutral? Is it Firm — does it end the exchange? If any answer is no, edit. Then wait twenty minutes and re-read it as if a judge will. Because one day, a judge might.
When BIFF isn't the answer
Frequently asked questions
Does BIFF work on a narcissist?
Do I have to reply to every message?
What if they escalate when I stop reacting?
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Communication Skills for High-Conflict Divorce
Simple guidance for handling high-conflict conversations.