The Contentious Probate Impact of Home Testing Kits

Written by Tanya Waterworth, Digital Content Writer

About Our Legal Expert: This content is produced with oversight by Michael Jefferies, Managing Director who has over 30 years’ legal experience.

DNA Surprises and Secret Families in England and Wales

The contentious probate impact of home testing kits after ancestry revelations has evolved into potential inheritance disputes and claims from individuals who were previously unknown to the family. In fact, the trend of home DNA testing kits has quietly become a disruptive force in contentious probate in England and Wales.

What started as a fun pastime by mapping ethnic heritage or building a family tree has changed families. While the law hasn’t changed, hidden family links may be revealed following a test ordered online.

How ancestry revelations are triggering inheritance claims

Perhaps the most significant shift is the sheer number of people discovering biological relationships they never suspected. Home DNA kits can routinely uncover:

• previously unknown children
• misattributed paternity
• half‑siblings born decades apart
• secret relationships hidden by earlier generations
• children conceived during affairs or brief relationships

These revelations can often surface after the parent has died. This means that the first legal flashpoint is usually probate. A newly discovered biological child may only learn of their parentage once the estate is already being administered. That child may then seek legal advice, triggering a claim under the Inheritance Act or a challenge to the distribution of the estate.

DNA kits don’t create new heirs, essentially they may reveal heirs who already existed in law.

Why home DNA kits create a unique type of probate dispute

Unlike traditional parentage disputes, which usually arise during the deceased’s lifetime, ancestry‑kit genealogy revelations can emerge:

• unexpectedly
• without any prior suspicion
• long after family relationships have settled
• at a point when the deceased cannot confirm or deny anything

This creates a distinctive form of contentious probate where:

• the family narrative is suddenly rewritten
• executors must reassess their duties
• beneficiaries face the possibility of reduced inheritances
• newly discovered children must navigate the emotional shock while asserting legal rights

Executors increasingly face claims from individuals who only discovered their biological parentage after uploading DNA to an ancestry platform.

The legal position of newly discovered biological children

In England and Wales, the law is clear: biological children have automatic inheritance rights, regardless of whether the family knew they existed.

However, three key principles matter most:

1. Parentage is a matter of fact

If DNA evidence shows a biological relationship, the law recognises that relationship. Family history, secrecy, or lack of contact does not diminish legal status.

2. A child does not need to be named in the will

If a will excludes a child, either intentionally or unintentionally, that child can still bring an Inheritance Act claim.

3. Intestacy rules apply automatically

If the deceased died without a will, a newly discovered child becomes a legal heir, sharing the estate equally with other biological children.

A child’s legal status does not depend on whether the deceased acknowledged them.

When the Inheritance Act 1975 becomes relevant

The Inheritance (Provision for Family and Dependants) Act 1975 allows biological children to claim “reasonable financial provision” from an estate. This applies even if:

• the child never met the deceased
• the deceased never knew the child existed
• the family had no idea about the relationship
• the child only discovered the truth after death

The six‑month deadline from the grant of probate still applies, but if the time limit has passed, it becomes more difficult to make a contentious probate claim

Courts recognise that ancestry‑kit discoveries often occur too late for the usual deadlines, and they may be willing to extend time limits where justified.

How DNA surprises are reshaping probate administration

Executors now face a more complex risk landscape. Home DNA kits have created a new category of probate disruption:

• claims from individuals who were never part of the family narrative
• challenges to distributions already made
• disputes between long‑established families and newly discovered relatives
• requests to pause administration while biological relationships are clarified

Executors need to tread carefully if they are aware of a credible claim from a newly discovered child.

It’s advisable for executors to pause distribution if a credible biological relationship emerges, even if the estate is nearly complete.

Anonymised real‑world examples

Example 1: The unexpected daughter

A man in his seventies took a home DNA test for fun. The results revealed a daughter he never knew existed. He died before updating his will, leaving everything to his two sons. The daughter only discovered the connection after his death when she matched with the sons’ children on an ancestry platform.

She brought an Inheritance Act claim and received a share of the estate. The sons had to repay distributions they had already received.

Example 2: The misattributed paternity

A woman died leaving her estate to her “only child”. Months later, a man in his fifties discovered through a DNA kit that he was her biological son, the result of a relationship she had kept secret.

He challenged the distribution and succeeded in an Inheritance Act claim because the deceased had a moral obligation to make provision for him.

Example 3: The executor’s dilemma

An executor was midway through administering an estate when a stranger contacted him claiming to be the deceased’s biological child. The executor initially dismissed the claim, but when the claimant produced DNA evidence linking him to the deceased’s known children, the executor had to halt distribution.

The estate was ultimately recalculated under intestacy rules which reduced the shares of the previously identified heirs.

Why these disputes are increasing

Three forces are driving this trend:

• Accessibility: DNA kits are cheap and widely available.
• Connectivity: millions of people upload results to global databases.
• Cultural openness: people are more willing to explore family history, even when it may reveal uncomfortable truths.

The result is a surge in inheritance claims from individuals who never knew they were biological children of the deceased.

Practical steps for families and executors

• Executors should treat DNA‑based claims seriously, especially where evidence is credible.
• Families should seek early legal advice if a newly discovered relative emerges.
• Potential claimants should act quickly, even if the six‑month deadline has passed.
• Wills should be reviewed regularly, particularly where family circumstances are complex.

Starting a Contentious Probate Claim

If you need advice on what to do about an ancestry DNA kit results and a potential contentious probate claim, we partner with specialist contentious probate solicitors.

We can guide you through the process of what to do next. Call us at 0333 358 2345 or contact us online for a free, no-obligation consultation.

We offer a range of fee structures, including ‘No Win, No Fee’ for certain cases along with other flexible funding, so speak to our team to find out more.