DNA Tests Can Be Inaccurate, But You May Have the Right to Sue the Paternity Testing Firm 

Hossein Berenji, Mar 26, 2025

When it comes to resolving questions about family relationships in California, paternity tests are often seen as near-absolute proof. But in reality, DNA tests can be inaccurate. From technical errors to lab mix-ups, many factors may lead to incorrect results. If this happens, the affected parties can face emotional harm, financial problems, and legal dilemmas—particularly when these tests are used in paternity disputes.

How Paternity Tests Can Go Wrong

Even though DNA analysis is usually reliable, there is still a margin of error in every test. 

Mistakes often involve:

  • Laboratory errors: Technicians might label samples incorrectly or fail to maintain a clean workspace. Contamination can mix genetic material and skew test outcomes.
  • Faulty equipment: Outdated or malfunctioning devices used to process DNA can yield inaccurate data, pointing to the wrong results.
  • Human oversight: If staff members rush or ignore proper protocols, an otherwise accurate test can become useless due to simple carelessness.

Each error has the potential to upend a family’s situation. A father might pay child support for a child who isn’t biologically his, or a parent might lose valuable years with a child they didn’t know was theirs. In serious cases, the emotional toll runs high.

California Laws on Paternity Testing

California courts generally accept DNA results as convincing evidence in paternity cases. However, if you can prove the test was flawed, the judge could discard it or order a new one. State law also supports the idea that laboratories must follow industry standards to ensure their analyses are correct.

Since paternity disputes often end in child support orders, custody arrangements, and other significant legal outcomes, a faulty DNA test can cause major harm. In such cases, you may consider suing the testing firm under, for example, a negligence cause of action.

Impact of False or Inaccurate Results

A mistaken paternity test can hurt almost every facet of a family’s life. If an error leads a supposed father to financially support a child who isn’t biologically related, that money might never be recovered. Conversely, if a real father is wrongly excluded, the child could miss out on emotional bonds or financial benefits like health insurance.

Such errors can also shatter trust between partners, disturb children’s sense of identity, or spark stressful legal battles. For instance, reversing a child support order after years of payments can be complicated and time-consuming. The consequences of a single botched result might linger for years.

Can You Sue a Paternity Testing Firm?

If a lab’s negligence directly causes emotional, financial, or legal damage, you might file a civil lawsuit against the testing firm. There are also other possible causes of action you can utilize, such as breach of contract. Ultimately, the facts and circumstances of your situation will determine your legal rights and the best path forward.

Damages in these cases might cover money spent on legal fees, child support wrongly paid, or emotional distress from the ordeal. Keep in mind these lawsuits are often complex, involving technical scientific testimony and detailed lab procedures. That’s why getting help from a seasoned lawyer can be crucial.

Contact a California Family Lawyer for Help

Errors in DNA testing can turn people’s lives upside down. Whether you’ve been wrongly identified as a parent, unfairly excluded, or simply doubt the results, you do have legal options in California. A family lawyer experienced in paternity cases can advise you on what your best course of action is in any of these scenarios. Contact an attorney today for an initial consultation. 

Contact a California Divorce Lawyer Today

For more information, contact our experienced California divorce lawyers at Berenji & Associates Divorce Lawyers by calling (310) 271-6290 to schedule a consultation.

We serve all through Los Angeles, Beverly Hills, Los Angeles County, and its surrounding areas. Visit any of our offices at:

Berenji & Associates Divorce Lawyers Los Angeles Office
550 S. Hill Street STE 1467
Los Angeles, CA 90013
(213) 277-2586

Berenji & Associates Divorce Lawyers Beverly Hills Office
9465 Wilshire Blvd #333
Beverly Hills, CA 90212
(213) 277-2586