Requesting a DNA Test in Probate

Duane received a letter from the executor of his mother’s estate. It stated, unequivocally, that a man named Arthur was his half-brother, and therefore entitled to a share of the estate. Duane hadn’t seen Arthur since childhood, didn’t recognize the name, and strongly suspected a fraud. He’d always believed he was an only child. Now, facing a potential six-figure distribution to a complete stranger, he needed to know: could he legally demand a DNA test to prove Arthur wasn’t related? And if so, how? The cost of inaction—allowing a fraudulent claim to succeed—was simply too high.

What happens when paternity is questioned in a probate estate?

When an alleged heir appears claiming a blood relation to the deceased, and that relationship is contested, California probate law provides mechanisms to establish biological connection – or to disprove it. It’s not a simple matter of “just getting a DNA test,” however. The court must be involved, and a formal process must be followed. Simply obtaining a private DNA test and presenting the results won’t be sufficient to resolve the matter.

How does the court determine biological heirship?

The primary method is through a Probate Code § 6302 Petition for Determination of Heirship. This petition asks the court to formally determine who the legal heirs are, and that includes resolving any paternity issues. You’ll need to file this petition with the probate court overseeing the estate, serve it on all interested parties (the executor, the alleged heir, and other beneficiaries), and present evidence supporting your challenge.

What kind of evidence is admissible to prove or disprove paternity?

While DNA testing is the most conclusive evidence, the court will consider other supporting documentation. This might include birth certificates, adoption records, affidavits from family members, and even historical family correspondence. However, DNA is king. The court will likely order DNA testing from a certified laboratory – a laboratory it trusts to ensure the results are accurate and admissible. You can request the court order testing, but the final decision rests with the judge.

Can the executor refuse to pay for a DNA test?

This is a common issue. The executor has a duty to administer the estate fairly and to investigate all claims. However, if the paternity claim is vigorously contested, the executor might reasonably refuse to spend estate funds on a DNA test until the court orders it. In that scenario, the party requesting the test – in Duane’s case, himself – would likely have to bear the initial cost. However, if the test proves the claimant is not related, the estate can seek reimbursement from the claimant for those expenses.

What if the alleged heir refuses to take a DNA test?

Refusal to submit to DNA testing can be seen very negatively by the court. The court can, and often will, draw a negative inference from that refusal. Essentially, the judge can assume the claimant has something to hide. The court can even issue an order compelling the alleged heir to submit to testing, and failure to comply with that order can lead to sanctions or a default judgment against them.

What if the will was written before the alleged heir was born?

The timing of the birth relative to the will’s execution is important, but doesn’t necessarily preclude a claim. If the will doesn’t explicitly address children born after a specific date, or if it contains language that could be interpreted as including children born later, a claim can still be made. The court will examine the will’s intent and consider all evidence to determine if the alleged heir should be included.

As a CPA and attorney with over 35 years of experience in estate planning and probate litigation, I often see these disputes arise from incomplete family histories or attempts to manipulate the estate. My dual credential allows me to not only navigate the legal complexities but also to understand the financial implications of these claims – including the potential impact on capital gains tax basis and the proper valuation of estate assets.

What if there’s a suspicion of fraud or undue influence in this paternity claim?

If you suspect the alleged heir is fraudulently claiming paternity, or if there’s evidence of undue influence (perhaps the deceased was coerced into acknowledging this person as their child), you need to present that evidence to the court. The standard of proof is high, but the consequences for a successful fraud claim are significant. Probate Code § 859 provides that if someone uses undue influence, fraud, or bad faith to take estate assets, the court can order them to return the property PLUS pay a penalty of twice the value of the assets recovered. This “double damages” statute is the most powerful weapon in probate litigation.

What causes California probate cases to spiral into delay, disputes, and extra cost?

California probate is designed to provide court-supervised transfer of property, yet cases often break down when authority is unclear, required steps are missed, or disputes arise over assets, notice, and fiduciary conduct. When the process is misunderstood, families can face avoidable delay, escalating conflict, and increased exposure to creditor issues, hearings, or litigation before the estate can close.

A stable probate administration outcome usually follows from clarity, consistency, and readiness for court review, especially when multiple stakeholders and competing interpretations are involved. When documentation supports enforcement and timelines are respected, families are less likely to face preventable escalation.

Verified Authority on California Probate Litigation

• Double Damages (Bad Faith Taking): California Probate Code § 859
  The “nuclear option” of probate litigation. If the court finds that a person has in bad faith wrongfully taken, concealed, or disposed of property belonging to the estate, the judge may assess liability for twice the value of the property, in addition to recovering the asset itself.
• Grounds for Removal of Executor: California Probate Code § 8502
  This statute lists the specific legal reasons a judge can fire a Personal Representative. Common grounds include wasting or mismanaging assets, neglecting the estate (moving too slow), or having an incurable conflict of interest with the beneficiaries.
• The “850 Petition” (Title Disputes): California Probate Code § 850
  Probate litigation often revolves around ownership. This powerful petition allows the probate court to solve title disputes without filing a separate civil lawsuit. It is used when an asset is titled to a third party but belongs to the estate (or vice versa).
• Presumption of Undue Influence (Caregivers): California Probate Code § 21380
  To prevent elder abuse, California law makes it incredibly difficult for paid caregivers to inherit from their patients. The law presumes the gift was the result of undue influence, forcing the caregiver to prove their innocence in court, often requiring a “Certificate of Independent Review.”
• Civil Discovery Rules Apply: California Probate Code § 1000
  Probate is not just administrative; it is a court of law. This code section confirms that the standard rules of civil practice apply. This means litigators can use interrogatories, depositions, and demands for production of documents to build their case against a rogue executor.
• Extraordinary Fees (Litigation Costs): California Probate Code § 10811
  Litigation is not covered by the standard statutory fee. Attorneys can petition the court for “extraordinary fees” for litigation services (e.g., defending a will contest or recovering stolen property). These fees are billed hourly and must be approved by the judge.