Can Text Messages Be Used as Evidence in a Custody or Divorce Case?

Most people facing a contested family law case in San Diego County have a phone full of messages they believe tell the real story: a threat sent late at night, a promise about the house, a refusal to hand the children back, an admission about money. Others are on the receiving end, worried that a few angry texts pulled out of context will be held up in front of a judge. Either way, the question is the same: will the court actually look at these messages, and what has to happen first?

When a case is headed for a hearing or trial, preparation is what separates evidence that gets considered from evidence that never makes it in. That is the kind of assertive, well-prepared advocacy people are usually looking for when settlement has stalled. This article walks through how California's evidence rules treat text messages, how they come up in divorce, custody and support disputes, how they are gathered lawfully, and how they get challenged. If you are in immediate danger, call 911.

Admissibility is the threshold question. Before a judge can decide what a message means or how much it matters, the judge must decide whether it may be considered at all. A message that exists on a phone and a message that has been admitted into evidence are two very different things.

The California Evidence Code treats a text message as a "writing." Evidence Code section 250 defines that word broadly to include "every other means of recording upon any tangible thing, any form of communication or representation, including letters, words, pictures, sounds, or symbols, or combinations thereof." Texts, emails, app messages and screenshots of them all fall inside that definition.

Because a text is a writing, two separate hurdles apply. The first is authentication, under Evidence Code section 1400: proof that the message is what the person offering it claims it is. The second is the hearsay rule, under Evidence Code section 1200, which generally keeps out statements made outside the courtroom when they are offered to prove that what they say is true. Each hurdle is explained below.

For someone in a San Diego County case who wants to use messages, or who wants to keep the other side's messages out, both tests matter. Clearing one does not clear the other.

Evidence Code section 1400 defines authentication as "the introduction of evidence sufficient to sustain a finding that it is the writing that the proponent of the evidence claims it is," or establishing those facts by any other means the law provides. The "proponent" is simply the party offering the evidence. Evidence Code section 1401 makes the requirement firm: a writing must be authenticated before it may be received in evidence.

With text messages, the usual fight is over who wrote them. Authentication is commonly shown through a combination of:

• the phone number or account the message came from, and whether it matches the person claimed to be the sender;
• context in the conversation that points to the sender, such as a nickname, a reply to an earlier message, or a reference to a shared event;
• testimony from someone with personal knowledge, such as the recipient explaining how they know who they were texting with;
• metadata or carrier records showing when and from what number a message was sent.

Content alone can sometimes be enough. Under Evidence Code section 1421, a writing may be authenticated by evidence that it "refers to or states matters that are unlikely to be known to anyone other than the person who is claimed by the proponent of the evidence to be the author of the writing." A message mentioning a private detail only the other parent would know can do real work here.

Screenshots raise their own question. A screenshot is itself a writing, so it must be shown to accurately reflect the original message. Evidence Code section 1552 creates a presumption that a printed representation of computer information is accurate, but that presumption shifts once the other side introduces evidence that the printout is inaccurate or unreliable. At that point, the party offering it must prove its accuracy by a preponderance of the evidence. The Superior Court of California, County of San Diego applies the same Evidence Code standards as every other California superior court.

The opposing party can challenge authentication by arguing the sender cannot be identified, the screenshot was edited, or the metadata is missing. Keep in mind that authentication is only a threshold showing. It proves the message is genuine, not that what it says is true, and an authenticated message can still be excluded on other grounds.

Evidence Code section 1200 defines hearsay as "evidence of a statement that was made other than by a witness while testifying at the hearing and that is offered to prove the truth of the matter stated." Except as provided by law, hearsay is inadmissible. A text message is an out-of-court statement, so if it is offered to prove that what it says is true, it is hearsay unless an exception applies.

This is often where people's assumptions about their messages shift. The question is not just what a text says, but what it is being offered to prove. The exceptions that come up most in family law include:

Statements of a party. Under Evidence Code section 1220, a statement is not made inadmissible by the hearsay rule "when offered against the declarant in an action to which he is a party." The declarant is the person who made the statement. In practice, this means a spouse's or parent's own texts can generally be offered against them in their own divorce or custody case. It is the exception used most often for text messages in family court.

State of mind. Evidence Code section 1250 allows a statement of the declarant's then-existing state of mind, emotion or physical sensation, including intent, plan or motive, when that state of mind is itself an issue or when the statement is offered to prove or explain the declarant's conduct. It does not allow a statement of memory or belief to prove the fact remembered or believed.

Messages not offered for their truth. Some messages matter because they were sent, not because their content is true. A threat, a demand, or a message forming an agreement is the act itself. When a message is offered for that purpose rather than for its truth, it falls outside the definition of hearsay in section 1200.

Layered statements need extra care. A text that quotes what someone else said contains hearsay within hearsay. Under Evidence Code section 1201, that kind of evidence is admissible if each layer either is not hearsay or meets the requirements of an exception.

Family law matters in this county are heard by the Superior Court of California, County of San Diego, and the court's family law resources describe the case types it handles. Text messages show up in nearly all of them.

Divorce. Messages may bear on the date of separation, on property agreements a couple discussed by text, or on a party's conduct during the case.

Custody. Messages between parents about the child's schedule, exchanges and school are common exhibits. Under Family Code section 3040(a)(1), when granting custody to either parent the court considers, among other factors, which parent is more likely to allow the child frequent and continuing contact with the noncustodial parent, consistent with sections 3011 and 3020. Texts refusing or encouraging contact can speak directly to that. Messages may also relate to the best-interest factors in Family Code section 3011, including the child's health, safety and welfare; a history of abuse; the nature and amount of contact with both parents; and the habitual or continual illegal use of controlled substances, the habitual or continual abuse of alcohol, or the habitual or continual abuse of prescribed controlled substances by either parent. For abuse and substance allegations, section 3011 lets the court first require independent corroboration, such as law enforcement or medical reports. Where texts are being used to support or answer serious accusations, the related topic of false allegations in custody cases is often part of the picture, as are the biggest mistakes in a custody battle, which frequently involve a parent's own messages.

Domestic violence restraining orders. Texts are often offered to show threats, harassment, or a pattern of conduct over time.

Support. Messages may be offered to show income, an informal agreement about support, or a party's financial situation.

The family law setting does not create its own evidence standard. The same authentication and hearsay analysis applies in every one of these proceedings. The court also weighs admitted messages alongside everything else in the record, and a single text rarely decides an outcome on its own. Organizing exhibits well is part of preparing for a family court hearing.

Messages a person sent or received on their own phone can be used without any special process. Screenshots taken by the recipient from their own device are the most straightforward way to preserve them, ideally with the phone number, date and surrounding conversation visible.

When messages are held by the other party, formal discovery is the lawful route. Discovery is the court-supervised process in which each side can require the other to produce relevant documents and information, and in a family law case it can include requests for electronic communications. A party may also subpoena a wireless carrier for metadata, such as numbers and times, which can help with authentication. A subpoena is a court-issued demand for records or testimony.

Preservation matters once a case is anticipated. Deleting relevant messages can damage a party's credibility, and courts can take the destruction of evidence into account. Keeping messages intact protects both sides' ability to show the full conversation.

There are firm legal limits. Penal Code section 632 generally prohibits intentionally using a recording device to eavesdrop on or record a confidential communication without the consent of all parties, subject to limited statutory exceptions. A "confidential communication" generally is one carried on in circumstances suggesting a party wants it kept among the participants, not a conversation in a public setting or an open court or legislative proceeding. Under section 632(d), evidence obtained in violation of the section generally is not admissible in any judicial proceeding, except in a case about the violation itself. Section 632 addresses recording, not texting, and it does not authorize anyone to get into another person's phone, account or stored messages. Accessing someone else's device or accounts without consent raises separate legal problems under other state and federal laws, and evidence gathered that way can create far more trouble than it solves.

Every hurdle described above is also a ground for objection. A contested case can turn on the exhibits that get kept out as much as those that come in.

Authentication failure. If the party offering a message cannot show who sent it, the court may exclude it under sections 1400 and 1401.

Hearsay with no exception. A message offered for its truth that fits no exception is inadmissible under section 1200.

Relevance. Evidence Code section 210 defines relevant evidence as evidence "having any tendency in reason to prove or disprove any disputed fact that is of consequence to the determination of the action." A message about something that does not matter to the issues in the case can be kept out.

Undue prejudice or confusion. Under Evidence Code section 352, the court "in its discretion may exclude evidence if its probative value is substantially outweighed by the probability that its admission will (a) necessitate undue consumption of time or (b) create substantial danger of undue prejudice, of confusing the issues, or of misleading the jury." Family law matters are decided by a judge, but the court's discretion to exclude still applies. Hundreds of repetitive messages may be trimmed on the consumption-of-time ground.

Altered or incomplete messages. A screenshot can be challenged as edited, cropped, or stripped of context. The other side may ask the court to consider the rest of the conversation so the selected messages are not misleading.

Objections generally have to be raised when the evidence is offered; a party who stays silent may lose the chance to object later. How strong any challenge is depends on the facts, and the same message can be admissible in one setting and excludable in another. Courtroom conduct around evidence also matters, which is covered in the guide on what not to do in family court.

Whether a set of texts helps or hurts usually depends on details that do not show up on a screen: who can testify to the sender's identity, what each message is being offered to prove, whether a hearsay exception fits, and what the rest of the conversation says. A consultation with the firm is a place to go over how these authentication and hearsay rules generally work in a divorce, custody, support or restraining order matter, and how messages like these are typically challenged. San Diego Family Law Advocates practices California family law only, so questions about other kinds of cases are better directed elsewhere.

To discuss how these evidence rules generally apply to text messages in family law matters, call San Diego Family Law Advocates at 858-758-2288 for a confidential consultation.