The BIFF Method for Co-Parenting: A Complete Guide

You just got a message from your co-parent. It's 11 PM. It's hostile. Your thumbs are already moving, typing something you'll regret.

Stop. There's a better way.

What is the BIFF Method?

BIFF stands for Brief, Informative, Friendly, and Firm. It was developed by Bill Eddy, co-founder of the High Conflict Institute, specifically for communicating with high-conflict personalities. Family law attorneys, therapists, and mediators across the country recommend it because it works.

The idea is simple: instead of matching your co-parent's energy, you respond with a message that is:

• Brief — Keep it short. Two to five sentences. No essays, no explanations, no justifications. The longer your message, the more ammunition you're providing.
• Informative — Stick to facts. Dates, times, logistics. Not feelings, not history, not opinions.
• Firm — State your position clearly. No hedging, no "maybe," no "I guess." But also no threats or ultimatums.
• Friendly — A brief, warm close. "Thanks," "I appreciate it," "Have a good evening." Not sarcasm. Not passive aggression. Genuine warmth — even when you don't feel it.

Why BIFF Works With High-Conflict Co-Parents

High-conflict co-parents thrive on engagement. Every emotional reaction — every defensive paragraph, every counter-accusation, every "I can't believe you just said that" — feeds the cycle.

BIFF starves it.

When you respond with a BIFF message, you're not ignoring the provocation. You're acknowledging the core issue (the informative part) and moving on. There's nothing to argue with. Nothing to escalate. Nothing to screenshot and send to an attorney as evidence of your "hostility."

BIFF in Practice: Before and After

Your co-parent sends:

"You're ALWAYS late picking up the kids. They were standing outside for 20 minutes yesterday. You clearly don't care about them. This is going in my next filing."

Your gut reaction:

"Are you kidding me? I was 5 minutes late ONE TIME because of traffic. You're the one who canceled three weekends in a row. Maybe worry about your own parenting before you come at mine."

Your BIFF response:

"I'll make sure to arrive by 5:00 PM going forward. If I'm running more than 5 minutes late, I'll text you. Thanks for letting me know."

Same situation. Completely different outcome. The BIFF response acknowledges the concern, commits to a solution, and ends warmly. There's nothing to escalate.

The Hard Part: Writing BIFF When You're Angry

Here's the truth nobody talks about: knowing about BIFF and actually using it are two very different things.

When your co-parent accuses you of being a bad parent at 11 PM, your brain doesn't think "let me craft a Brief, Informative, Friendly, and Firm response." Your brain thinks "I need to defend myself RIGHT NOW."

That's the gap between theory and practice. And it's the gap that Civly was built to close.

How Civly Automates BIFF

Civly doesn't just teach you about BIFF — it does the rewriting for you.

1. Write what you really feel. Go ahead. Type the angry version. Get it all out. Civly stores this as your private vent — only you (and optionally your attorney) can ever see it.

2. Civly rewrites it. In under five seconds, Civly transforms your message into a BIFF-compliant version. Brief. Informative. Firm. Friendly. Court-safe.

3. You approve before it sends. You see both versions side by side. Your original vent on the left, the BIFF version on the right. You can edit the BIFF version or approve it as-is. Nothing sends without your explicit approval.

4. Every message is scored. Civly analyzes every message — yours and your co-parent's — on a conflict scale of 1 to 5. Patterns are tracked over time. If your co-parent's messages are consistently hostile, you have the data to prove it.

Beyond BIFF: What Else Helps

BIFF is a communication technique, not a complete co-parenting strategy. Here's what else matters:

• Documentation — Keep records of everything. Every message, every schedule change, every expense. Civly does this automatically with SHA-256 verified, tamper-evident records.

• Boundaries — You don't have to respond immediately. Take 24 hours if you need to. Civly's smart notifications will remind you if a message needs a response.

• Professional support — A good family law attorney and a therapist are invaluable. Civly lets you export your complete communication record in one click and hand it to your lawyer.

• Focus on the kids — Every message should pass the "would I be comfortable if my kids read this in 10 years?" test. BIFF helps you pass it every time.

Getting Started

If you're co-parenting with a high-conflict ex, you don't need another app that just stores your arguments. You need a tool that helps you communicate better.

Civly costs $79 per year (or $7.99/month) — less than a single hour with a family law attorney. And unlike an attorney, Civly is available at 11 PM when that hostile message arrives.

Start using Civly today →

This is general information, not legal advice. Custody law varies by state and by judge, and only a licensed family law attorney in your state can advise you on your own case.

You still have to answer that text tonight. Start tonight — $79/year →