A mother had died, leaving a £1.5 million estate. A will signed just three months before her death left everything to the son. An earlier will had split it equally. The sister was left with nothing but a legal bill that would eventually pass £200,000.
The relationship was destroyed. It took two years for the court to set the will aside. This is the real, human cost when estate planning fails.
The Paper Trail Decides
The challenge was not based on emotion. It was built on cold, hard evidence. We examined the mother’s final year. Her medical records from the GP showed increasing cognitive decline. Care home notes detailed episodes of deep confusion. Witness statements from her carers confirmed she no longer recognised family members consistently.
The solicitor who drafted the final will had not known her long. Critically, they failed to get a medical opinion on her capacity, a standard step for an elderly or unwell client. Her signature was valid, but her understanding was not. The entire case rested on proving she did not meet the legal test for capacity when she signed that document. The paper trail, or the lack of one, decided everything.
A Simple Document Is a Shield
This outcome was not inevitable. The cost and the damage to the family were entirely avoidable. The single most effective defence would have been a registered Lasting Power of Attorney (LPA), made years earlier when her capacity was beyond doubt. An LPA does more than appoint attorneys to act for you. It creates an official, time-stamped record of your sound mind and your settled wishes.
It provides a clear line of sight for professionals and the family. It makes it substantially harder for anyone to later claim you lacked capacity when making other important decisions, like writing your will. This simple document becomes a shield for your legacy.
It is incredibly difficult to watch a family dismantle itself over a document. These are not abstract problems. If you are reviewing your own arrangements, we should talk.
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Written by Sean Kiani, Estate Planner at Inheritance Made Simple. Sean writes and reviews the firm's guidance on estate planning, wills, trusts and inheritance tax, and works with families across Bournemouth, Poole, Dorset and Central London. Verify Sean's Society of Will Writers membership listing.