Have you ever written a message to a high-conflict co-parent or colleague—and regretted it immediately after? You’re not alone. Many of us struggle to stay calm, clear, and effective when dealing with high conflict people, especially during a divorce, legal dispute, or intense relationship breakdown. That’s where the BIFF Method (or BIFF strategy), developed by Bill Eddy, LCSW, JD, comes in.

This article is your guide to using BIFF responses—Brief, Informative, Friendly, and Firm—to communicate with clarity and dignity. Whether you’re navigating court battles, managing social media blow-ups, or resolving workplace issues, BIFF can help.

Bill Eddy: The Expert Behind the BIFF Method

Bill Eddy is a lawyer, therapist, author, and mediator with a unique background in both psychology and law. As the Chief Innovation Officer of the High Conflict Institute (HCI), he’s trained thousands of professionals around the world in managing high-conflict disputes. He’s also a conjoint associate professor at Newcastle Law School and affiliated with the Straus Institute for Dispute Resolution at Pepperdine University School of Law.

Eddy’s work stems from his high conflict personality theory, which identifies specific patterns of behavior and blame often seen in people with personality disorders. His approach isn’t just theoretical—it’s built from years of real-world mediation, consultation, and courtroom experience.

Book Spotlight: BIFF Strategy and Beyond

Eddy has written over 20 books, including the original BIFF: Quick Responses to High-Conflict People—a must-have manual for anyone communicating in high conflict situations. His books are recommended reading for therapists, lawyers, and parents alike, especially those dealing with managing narcissists or navigating divorce and co-parenting challenges.

Other key titles include:

It’s All Your Fault at Work!
The Future of Family Court
Managing High-Conflict Personalities

Each book is grounded in professional experience and offers step-by-step training in conflict-reducing techniques.

High-Conflict: What It Really Means

The term “high-conflict” doesn’t just mean difficult. According to Eddy and the High Conflict Institute, it often refers to high-conflict personalities—people who consistently escalate conflict, avoid responsibility, and blame others for everything. These traits can show up in any organization, courtroom, or relationship.

In some cases, high-conflict people may meet criteria for borderline, narcissistic, or antisocial personality disorders. Others simply exhibit intense patterns of blame, rigid thinking, and all-or-nothing behavior. Regardless, the result is the same: dispute after dispute, emotional exhaustion, and stalled resolution.

New Ways to Respond: The BIFF Method in Action

BIFF gives you a new way to respond with confidence. Here’s how it works:

Brief: Keep it short. Don’t over-explain or justify.
Informative: Share facts. Avoid opinions or emotional language.
Friendly: Be respectful and non-threatening.
Firm: End the conversation with a clear boundary.

Let’s say your ex sends a 500-word email accusing you of being a negligent parent. Instead of reacting defensively, a BIFF response might look like:

“Thanks for your message. I’ll be picking up the kids at 4 p.m. as planned. Let me know if there’s any change to their schedule.”

That’s it. No drama. No back-and-forth. You stay in control.

Dispute Management for Professionals and Parents

The BIFF method is not just for family court. Workplace conflicts, neighbor disputes, and even heated social media threads can benefit from BIFF communication. Professionals in HR, legal, and customer service roles are now trained in BIFF as part of their conflict resolution strategy.

Need help applying it in your life? The High Conflict Institute (HCI) offers direct consultation, workshops, and training for individuals, clients, and organizations alike. Whether you’re a coach, mediator, or just a parent stuck in the loop of high-conflict behavior, you can manage your communication with more confidence.

The Podcast, the Coach, the Author, and the Court Guide

On the Co-Parenting Beyond Conflict podcast, we’ve talked a lot about BIFF with Wendy Behary and other leading voices in coparenting. Megan Hunter, co-founder and Chief Innovation Officer of the High Conflict Institute, also talks a lot about BIFF on her podcast with Bill Eddy. Hunter brings a wealth of insight from her work in psychology, mediation, and law, helping clients worldwide navigate high-conflict personalities and find new resolution paths.

Looking for personalized help? The BestInterest Coparent Coach can help you craft BIFF-style messages right in the app, filtering out inflammatory tones and keeping communication focused and effective. Think of it as having a conflict-resolution expert in your pocket.

From Courtroom to Consultation: Training for the Real World

Whether you’re going through a divorce, managing personality-driven disputes, or facing off with a high-conflict co-parent, BIFF is a proven approach to reduce tension and protect your peace. It’s already used by court systems, legal professionals, and mediators in San Diego and beyond.

If you’re a lawyer, therapist, or organization leader, consider BIFF training through HCI. Their materials are grounded in research, real-world consultation, and developed in partnership with the world’s top faculty in conflict psychology.

FAQ: Mastering the BIFF Method

What does BIFF stand for in communication?

BIFF stands for Brief, Informative, Friendly, and Firm. It is a communication strategy developed by Bill Eddy, co-founder of the High Conflict Institute, designed to de-escalate hostile messages from high-conflict people (HCPs) by removing emotional triggers.

Does the BIFF method work with narcissists?

Yes. Narcissists often thrive on emotional reactions (whether positive or negative). The BIFF method works by starving them of this “narcissistic supply.” By keeping your response Brief (short), Informative (just the facts), Friendly (neutral tone), and Firm (clear boundary), you give them nothing to argue with, which often stops the conflict cycle.

What is the difference between BIFF and Grey Rock?

Both are strategies for dealing with toxic people. Grey Rock involves becoming uninteresting and unresponsive to bore the toxic person. BIFF is an active communication strategy for when you must respond (e.g., about custody logistics). Think of Grey Rock as a lifestyle and BIFF as a specific email template.

How can I practice writing BIFF responses?

It takes practice to remove your own defensiveness from a message. Tools like BestInterest’s Tone Guardian act as an AI coach, scanning your draft for emotional language and suggesting edits to ensure your message is “BIFF-compliant” before you hit send.

Why BIFF Works: The Psychology Today Take

As featured in Psychology Today, the power of BIFF lies in how it calms the nervous system—yours and theirs. It removes the emotional fuel that high-conflict people thrive on, making room for clear decisions, boundaries, and progress.

You won’t change their personality, but you can change how you respond. You can stop fueling the dispute and start reclaiming your peace.

Ready to Try BIFF?

Whether you’re writing an email to your ex, facing a workplace issue, or trying to set boundaries on social media, BIFF can help. It’s not about “winning” the argument. It’s about staying sane and safeguarding your time, energy, and mental health.

Need more support? Explore BIFF books, take a training, or book a consultation with HCI. BestInterest is also here to support you—through our AI powered coparenting app, and expert guidance that puts your well-being first.