If you are searching for what not to do during a custody battle, the short answer is: avoid anything that makes a judge question your judgment, your honesty, or your willingness to support your child’s relationship with the other parent. Courts decide custody using the “best interest of the child” standard, which weighs home environment, parental fitness, mental health, and each parent’s willingness to cooperate with the other.1Legal Information Institute. Best Interests of the Child That means your behavior outside the courtroom carries just as much weight as what happens inside it. The mistakes below come up again and again, and almost all of them are avoidable.
Don’t Disparage the Other Parent
Badmouthing your co-parent is one of the fastest ways to lose ground. It doesn’t matter whether the comments happen in front of the child, over the phone with a friend, or in a text message a screenshot can capture. When a judge sees a pattern of trying to poison a child’s view of the other parent, the label is parental alienation, and courts take it seriously. A parent who can’t separate personal frustration from the child’s need for two healthy relationships looks unfit to make decisions in that child’s best interest.
The consequences are concrete. Courts that find alienating behavior can reduce parenting time, order supervised visitation, or require therapeutic intervention. In extreme cases, primary custody can shift to the other parent. Many custody agreements also include non-disparagement clauses that specifically prohibit this conduct, and violating one can trigger contempt proceedings.2American Academy of Matrimonial Lawyers. The Use of Non-Disparagement Clauses in Family Law Cases Judges also notice subtler versions: sighing when the child mentions the other parent, scheduling fun activities during the other parent’s time, or telling the child about the legal proceedings.
Don’t Put the Child in the Middle
Children are not messengers, spies, or allies. Yet parents in custody disputes routinely use them to relay scheduling information, pump them for details about the other household, or vent about how unfair the process has been. A judge who learns this is happening sees a parent putting their own emotional needs ahead of the child’s well-being.
Asking a child to carry messages between households puts them in an impossible position. So does interrogating them after a visit about who was at the other parent’s house. Standard custody orders frequently include explicit prohibitions against questioning a child about the other parent’s activities or exposing them to court filings.
Coaching a child before a custody evaluation or an interview with a guardian ad litem is an especially damaging version of this behavior. Trained professionals can detect rehearsed answers, and when they do, the coached parent’s credibility collapses. Let the child speak naturally.
Watch What You Post, Text, and Send
Anything you put online can end up in front of a judge. Social media posts, text messages, emails, and even private messages on platforms that feel ephemeral all create a permanent record. A single heated text can undercut weeks of testimony about being cooperative. Courts routinely admit screenshots and message logs as evidence of a parent’s character and judgment.
The posts that cause the most damage are usually the ones a parent thought were harmless. Photos from a night out with visible alcohol or drugs raise questions about parenting judgment. Venting about the other parent signals an inability to co-parent. Posts about new purchases or vacations can contradict claims of financial hardship when child support is at issue.
Deleting posts after litigation has started makes everything worse. Courts can sanction parties who destroy relevant evidence, a concept lawyers call spoliation. In one widely cited case, a court sanctioned both an attorney and their client after the attorney instructed the client to clean up a Facebook page and delete photographs; the deleted content was recovered by forensic experts, and the sanctions were far more damaging than the photos would have been.3American Bar Association. Discovery and Preservation of Social Media Evidence Assume everything you post, send, or search can be presented in court.
Follow Every Court Order Exactly
Temporary custody orders are issued early in many cases. They set rules for visitation, communication, living arrangements, and sometimes finances. They are not suggestions. Violating them is one of the most self-destructive things a parent can do.
The most common violation is denying the other parent their scheduled parenting time. Parents rationalize it: the child didn’t want to go, the other parent was late to pickup, some new concern justified withholding. Judges almost never accept these explanations. What they see is a parent who thinks they’re above the court’s authority, which raises an obvious question about whether that parent will follow a final order either.
Contempt findings carry escalating consequences: fines, make-up visitation for the other parent, payment of their attorney fees, and in serious or repeated cases, jail time or a custody modification against the non-compliant parent. Some jurisdictions also allow suspension of a driver’s or professional license. If an order is genuinely unworkable, the remedy is a motion to modify it, not unilateral defiance.
Don’t Make False Allegations
Few things destroy credibility faster than a fabricated or exaggerated accusation of abuse or neglect. Judges assess credibility throughout a case, and a proven falsehood taints everything that parent says afterward, including legitimate concerns raised later.
The consequences go beyond lost credibility. A parent caught making false accusations can face perjury charges, be ordered to pay the other parent’s legal fees, and see their own custody reduced or converted to supervised visitation. There’s a longer-term risk too: once a parent is tagged as someone who fabricates, courts may discount future reports even when real safety concerns exist. That puts the child at greater risk.
This isn’t an argument for silence about genuine concerns. If there’s real evidence of abuse, neglect, or substance abuse, bring it to your attorney and present it through proper legal channels. The line is between documented, good-faith concerns and accusations manufactured for tactical advantage.
Don’t Manipulate Your Finances or Employment
Money issues run through almost every custody dispute because child support depends on each parent’s income. Trying to manipulate that picture is transparent to courts.
Quitting a job, cutting hours, or taking a lower-paying position to shrink support obligations almost never works. When a court concludes that unemployment or underemployment is voluntary, it can impute income, calculating support based on what the parent could earn rather than what they currently earn. Courts look at work history, education, skills, and the local job market. The parent ends up with a support obligation based on potential income and a judge who now views them as someone willing to shortchange their own child.
Hiding assets, making large transfers to relatives, or running up debt to appear cash-poor are equally risky. Courts have broad discovery tools, and a parent caught hiding money can face sanctions, adverse inferences in property division, and an order to pay the other side’s fees incurred in uncovering the deception.
Avoid Substance Use and Risky Behavior
A parent’s drug or alcohol use is among the factors courts weigh in determining custody, and any substance use during a pending case gets heightened scrutiny.4American Academy of Matrimonial Lawyers. Substance Abuse and Custody Decisions This isn’t limited to illegal drugs. Excessive drinking, misuse of prescription medications, and even marijuana use in states where it’s legal can all raise fitness concerns.
When allegations surface, courts have options. A judge can order drug and alcohol testing, require treatment, mandate supervised visitation during the testing period, or prohibit alcohol within a set number of hours before parenting time. Failed or missed tests almost always result in reduced custody or a shift to supervised visitation.
What catches parents off guard is how little it takes to trigger these measures. A social media photo showing heavy drinking, a DUI arrest, or testimony from the other parent about erratic behavior can be enough to prompt court-ordered testing. A pending custody case is not the time to test the boundaries of your substance use, even if your actual consumption is moderate.
Don’t Make Major Life Changes Without Approval
Stability is one of the factors courts weigh most heavily.1Legal Information Institute. Best Interests of the Child Sudden, unilateral changes signal to a judge that a parent isn’t thinking about the child’s need for routine during an already disruptive time.
Don’t Relocate Without the Court’s Permission
Attempting to move with a child during a custody dispute, especially across state lines, is one of the most consequential mistakes you can make. Most states require court approval before a custodial parent can relocate beyond a specified distance, and the burden is on the relocating parent to show the move serves the child’s best interest. Moving without approval can result in an emergency order requiring the child’s return, plus a serious blow to that parent’s custody position.
Interstate moves also raise jurisdictional complications. Under the Uniform Child Custody Jurisdiction and Enforcement Act, adopted in all 50 states, a court can decline jurisdiction when a parent has engaged in unjustifiable conduct to invoke it, including relocating to gain a procedural advantage.5U.S. Department of State. Uniform Child Custody Jurisdiction and Enforcement Act Moving first and asking permission later backfires almost every time.
Be Careful About Introducing a New Partner
Dating during a custody dispute isn’t prohibited, but how and when a new partner enters the child’s life matters. Introducing a new partner too early, having them stay overnight during parenting time, or letting them take on a parental role before the case resolves can all work against you. If the new partner has a criminal record, substance abuse history, or their own contentious custody situation, the other parent’s attorney will use it.
Courts aren’t evaluating whether you have a right to date. They’re evaluating whether your decisions about who is around your child reflect sound judgment. Keep new relationships largely separate from parenting time while the case is pending.
Cooperate With Guardians Ad Litem and Custody Evaluators
In many custody disputes, the court appoints a guardian ad litem or custody evaluator to independently investigate and recommend an arrangement that serves the child’s best interests. These professionals interview both parents and the child, visit both homes, review records, and speak with teachers and doctors. Their report often carries enormous weight with the judge.
The mistakes here follow predictable patterns. Treating the evaluator as an adversary, being hostile during interviews, or trying to control the process virtually guarantees an unfavorable recommendation. So does spending the interview attacking the other parent instead of showing your own parenting strengths. Evaluators are trained to spot deflection, and a parent who can only talk about what the other parent does wrong sends a clear signal about their priorities.
Being dishonest with these professionals is worse. They cross-reference what each parent says against school records, medical records, and the child’s own statements. Lies surface quickly, and once your credibility is damaged with the evaluator, the report will reflect it. The right approach is straightforward honesty about both your strengths and your challenges. Evaluators expect imperfect parents; what they don’t tolerate is a manufactured image.
One Thing You Should Do: Keep Records
Most custody advice is about what to avoid. Here’s the exception: document everything. Parents who rely on memory to reconstruct events at trial put themselves at a disadvantage. A detailed, contemporaneous record is far more persuasive than a recollection from six months ago.
Keep a parenting log with the basics: when you have the child, what you do together, pickups and drop-offs, and schedule changes. Save every text and email with the other parent, especially about the child’s schedule, health, or education. Keep medical records, report cards, and receipts for child-related expenses. If something concerning happens during or after a visit, write it down immediately with date, time, and specific details.
Useful documentation is objective. Entries that read like an angry diary undermine their own credibility. Stick to what happened, when, and who was there. Never alter evidence. Don’t edit texts, crop screenshots to remove context, or rewrite exchanges. Courts can detect tampering, and the damage from doctored evidence is far worse than whatever the original record contained.