The BIFF Method: How to Respond to High-Conflict Co-Parenting Texts

You know the feeling. A text arrives from your co-parent. Your stomach tightens before you have even finished reading it. And already, before you set the phone down, you are composing a response in your head: one that is honest, thorough, and almost guaranteed to make things worse.

The BIFF method was developed for exactly this moment.

What Is the BIFF Method?

BIFF stands for Brief, Informative, Friendly, and Firm. It was created by Bill Eddy, a lawyer and licensed clinical social worker who spent years studying high conflict co-parenting communication and the patterns that either escalate situations or quietly defuse them.

The insight at the heart of the BIFF method is this: most escalation in high conflict co-parenting is not really about the content of the message. It is about the emotional material embedded in your response, and how the other person uses that material to keep the cycle alive.

The BIFF method cuts the material. Which eventually breaks the cycle.

What Each Letter Means

Brief. Your response should be two or three sentences. Not a paragraph. Not a detailed explanation of your reasoning. Two or three sentences.

Every sentence beyond that is something to argue with. If you justify yourself, they dispute the justification. If you explain your reasoning, they attack the reasoning. A short answer is just an answer. A short answer tends to end things.

Informative. Answer the actual logistical question in the message, and only that. Not the implied accusation. Not the emotional subtext. Not the grievance buried three sentences before the real question.

"Pickup is at 6pm Saturday" is informative. "Pickup is at 6pm Saturday, which you already know because we discussed this" is not.

Friendly. This does not mean warm. It does not mean you have forgiven them or want to reconnect. It means your message will read as civil and reasonable to any third party who sees it.

That third party might be a mediator, a judge, or a school administrator. You are not writing to your co-parent. You are writing for the record.

"Thanks" at the end costs you nothing and makes you look like the reasonable person in the situation.

Firm. Do not hedge, over-explain, or leave room for negotiation you do not want to have. "I will drop her off at 6pm Saturday" is firm. "I was thinking maybe around 6pm if that works for you" is an opening for a 45-minute argument.

BIFF Response Examples for Co-Parents

Here is what the BIFF method looks like in actual co-parenting communication.

Their message: "The kids told me you let them stay up past 10pm on a school night. That is completely irresponsible. You need to take bedtime seriously."

BIFF response: "Thanks for raising it. I will pay attention to that this week."

You have not agreed that anything was wrong. You have not defended yourself. You have given them nothing to escalate, nothing to take out of context, and nothing that reads as hostile to anyone reading the exchange later.

Their message: "You are always late. Every single time. It shows how little respect you have for my schedule."

BIFF response: "I will be there at 5pm. See you then."

Their message: "I think we should renegotiate the summer schedule. The current one is not working for the kids."

BIFF response: "Happy to look at that. I will send a few options by Friday."

Notice what is absent from each BIFF response example: defense, emotion, explanation, justification, anything that continues the conversation beyond what was actually necessary.

The Hardest Part

You will write the first draft. It will feel satisfying. It will have some genuinely excellent points in it. You will delete it.

Here is the practical sequence:

1. Read their message. Notice what it brings up in you. (You are allowed to feel it. You are not sending it.)
2. Find the actual logistical question, if there is one.
3. Answer only that.
4. Read your draft. Ask: "Is there anything here they could screenshot, misrepresent, or bring up later?"
5. Delete anything that meets that test.
6. Add "Thanks" if it reads too bare. Send.

Steps one through five are the hard part. Step six takes two seconds.

When You Do Not Need to Respond at All

Some messages contain no logistics question. They exist to provoke a reaction, sustain a conflict, or manufacture guilt.

You are not required to respond to those.

When there is nothing logistical to answer, silence is the BIFF method response. Not responding is a complete answer. It is often the best one.

Where the BIFF Method Fits Into Your Communication Strategy

The BIFF method handles the moment-to-moment response, but high conflict co-parenting communication has layers. Sometimes you need to understand what a message is actually saying before you can respond to it at all.

The Two Paths Message Decoder was built for that. Paste the message, and it shows you what is actually being communicated, which tactics are present, and gives you a starting point for a BIFF-style response.

Together, they take most of the guesswork out of co-parenting communication.

For more on managing communication in high conflict situations, see our guides to parallel parenting and co-parenting with a narcissist.