What Is a BIFF Reply? How to Answer a Hostile Co-Parenting Message

What the four letters mean

Brief means short. A few sentences is usually enough. The longer the reply, the more material there is to argue about.

Informative means you stick to the facts the other parent needs, such as a time, a place, or a yes or no. You leave out opinions, defenses, and commentary about their behavior.

Friendly means a neutral, civil tone. A simple "Thanks for letting me know" is plenty. You are not pretending to be close, you are keeping the temperature down.

Firm means the reply ends the conversation on that topic. You state your answer or the next step clearly, without threats and without inviting another round of debate.

Why it matters in a custody case

Texts, emails, and co-parenting app messages are often saved, and they can end up in front of a judge. A message written in anger can be read aloud later, out of context, by someone deciding what is best for your child.

Courts generally look at whether each parent can communicate about the child and cooperate on practical matters. How a court weighs communication between parents varies by state, so check your state's guide for specifics.

A calm written record also helps you. It shows what was actually asked, what you answered, and when, which is far more useful than a long thread of back and forth accusations.

How to write one

First, decide whether the message needs a reply at all. If it contains no real question and no decision to be made about your child, silence may be the best response.

If a reply is needed, find the one practical issue buried in the message and answer only that. Skip the insults, the history, and the accusations, even when they are untrue. Correcting every false statement usually starts a new argument.

Avoid the three things that tend to restart conflict: advice, admonishments, and apologies. Telling the other parent what they should do, scolding them, or apologizing for things that are not your fault all give them something new to react to.

Wait before you send. Reread it later, or ask someone you trust to read it, and cut anything that sounds sarcastic or defensive. Here is an example: "Thanks for the message. I can pick her up at 5 on Friday at the school. I will have her back Sunday at 6 as usual."

What BIFF does not do

BIFF is a communication habit, not a legal strategy. It does not change your court order, and it does not replace following the order you have.

If messages include threats, harassment, or anything that makes you fear for your safety or your child's safety, a polite reply is not the answer. Protective options and how to request them vary by state, so check your state's guide or contact local authorities or a domestic violence resource.

This page is general information, not legal advice. Onbello is a document preparation service, not a law firm. For advice about your specific situation, talk to a licensed attorney in your state.