Who Can Contest a Probate Proceeding

Not just anyone can challenge a will or estate in probate — only interested parties have legal standing. Interested parties typically include:

• Named beneficiaries in the current will — anyone who stands to receive something under the will
• Heirs under a prior will — someone who was named in an earlier version of the will that was later changed
• Intestate heirs — those who would inherit if the will were declared invalid and intestate succession applied
• Creditors — parties with legitimate claims against the estate may contest distribution decisions that affect their ability to collect
• Anyone with a financial stake in the outcome — the definition varies by state, but courts generally interpret "interested party" broadly

The Four Main Grounds for Contesting a Will

What a Will Contest Actually Costs

The financial damage of a contested probate is difficult to overstate:

• Attorney fees for both sides — both the estate defending the will and the challengers attacking it incur significant legal fees. Combined fees of $50,000–$200,000+ are common in contested estates
• Expert witness fees — medical experts, handwriting analysts, forensic accountants, and mental capacity experts can each cost $5,000–$25,000
• Extended timeline — contested probates routinely take 2–5 years, during which all estate assets remain frozen and carrying costs continue
• Diminished estate value — every dollar paid in legal fees during the contest comes from the estate before any beneficiary receives anything
• Opportunity costs — real estate that should have been sold or transferred years earlier continues to generate maintenance costs, taxes, and insurance while frozen in a contested estate

Why Trusts Are Much Harder to Contest

A revocable living trust provides substantially stronger protection against challenges than a will — for several structural reasons:

• Trusts are private. Unlike a will that becomes a public court document, a trust is never filed with any court. A potential challenger cannot review the trust to identify grounds for a challenge or assess the estate's value before deciding whether to litigate.
• Trusts are administered outside court. Without a probate proceeding, there's no public forum for challenges. A disgruntled heir would need to initiate their own lawsuit — a much higher barrier than simply filing an objection in an already-open probate case.
• Trusts demonstrate ongoing capacity. A revocable trust is managed and updated over years — creating a continuous record of the grantor's competency and intentional decision-making. This makes capacity challenges much harder to sustain than a challenge to a will signed on a single day.
• No-contest clauses are powerful. A properly drafted trust can include a no-contest (in terrorem) clause that causes any beneficiary who challenges the trust to forfeit their entire inheritance — creating a significant deterrent against frivolous challenges.
• Distribution happens faster. Before a challenger can organize a meaningful legal attack, assets may already be distributed through the trust. Once distributed, challenges become significantly more complex and expensive to pursue.

Common Mistakes That Lead to Contested Probate

• Unequal distributions without documentation or explanation. A will that leaves significantly more to one child without any written explanation of why is the single most common trigger for a will contest. A letter of instruction explaining the reasoning defuses this situation before it starts.
• Late changes to a will — especially when one person is present. A will changed in the last months of life, particularly when one beneficiary was involved in the process, is the highest-risk scenario for an undue influence claim. Document everything carefully.
• Using a will instead of a trust when family dynamics are contentious. A public probate proceeding gives every interested party a forum to challenge. A private trust administration removes that forum entirely.
• No-contest clause absent from the will or trust. Without a no-contest clause, challengers have nothing to lose by filing an objection — the cost is borne entirely by the estate. A no-contest clause changes the calculus dramatically.
• Not communicating intentions to family before death. Surprises create challenges. Family members who learn — for the first time at death — that they were excluded or received less than expected are far more likely to contest than those who were told in advance and had time to process the decision.

Real-Life Example