Pre Death Gift or Will Invalidation Burden of Proof

Among the questions most frequently raised in inheritance consultations:

We get consultations along the same lines often. This article, drawn from a joint explanation by attorneys Yoon Jisang and Roh Jongeon, walks calmly through the possibility of invalidating gifts and wills executed right before death and the weight of the burden of proof.

Where registration is completed pursuant to a gift contract and a notarized will is drawn up, the legal act is, in principle, presumed valid.

• Registration and notarization confer outward lawfulness
• The party asserting invalidity bears the burden of proof
• That proof is typically a very difficult task

So the starting premise is: "invalidity is the exception, validity is the rule."

To invalidate a gift or a notarized will, you must prove that the deceased lacked legal capacity at the time of the act.

• Not mere old age or illness, but the absence of a state in which the actor could understand the meaning of the act
• The inability to exercise free decision-making at that point
• Such an assessment must be supported by objective materials

The strongest material is medical records.

A case attorney Yoon Jisang handled.

• A gift of real estate worth roughly KRW 5 billion, made two weeks before the deceased's death
• The client was an adopted son; the counterparty an adopted daughter
• Filed with prosecutors on suspicion of private-document forgery
• Result: no-charge disposition

The prosecutor's reasoning, as relayed, was as follows.

• Under the presumption, the act is treated as having been made by the deceased's own intention
• The medical records confirm that the deceased was in very poor health
• However, whether the deceased was conscious at the time cannot be judged from medical records alone
• The deceased can no longer be asked about his intent at the time of the gift

When these factors stack up, criminal proof becomes effectively very difficult.

When the criminal route is hard, you typically litigate a civil invalidation. The key is medical-record-based expert evaluation.

• Based on the deceased's medical records, a specialist physician renders an opinion
• An assessment of whether the deceased could understand the meaning at the time of the gift or will
• Examination of invalidation potential based on the expert opinion

The fact of dementia alone does not result in invalidity. Typically the following tendencies are observed.

• Mild dementia: typically tends to be assessed as valid
• Severe dementia: validity or invalidity goes either way depending on the case
• Complete absence of legal capacity: invalidity may be recognized

Dementia covers a very wide spectrum. Even within early, middle, and late stages, temporary recoveries and deteriorations often alternate, so whether you can prove the state at a particular point in time becomes decisive.

To strengthen proof in your case, the following materials are central.

• General hospital and psychiatric medical records (including dementia screenings and cognitive-function tests)
• State descriptions in inpatient and outpatient records at each point in time
• Statements from caregivers and care workers
• Photographs and videos showing daily life
• Statements from family and relatives around the time of the gift or will

In particular, where a cognitive-function test was performed at a general hospital or a medical institution of a certain size, the objective evidence at that point is very important.

Sorting the criminal and civil paths for intra-family property crimes.

• Criminal: investigative authorities tend to be reluctant on the grounds that it is an "intra-family dispute." Burden of proof is heavy
• Civil: there is more room to litigate using objective materials such as medical-record expert opinions
• Typically, the civil invalidation claim sits at the center, and criminal serves as an auxiliary tool

The video's essential message is "prepare before the dispute begins."

• Create opportunities for family-member discussions during the parent's lifetime
• Secure objective materials on legal capacity in advance (including regular health-check results)
• Where a gift or will is to be made, ensure procedural transparency
• Decisions made in a state where the whole family is aware

Q. If, right before death, the entire estate is transferred to a single person, does it automatically become invalid? A. No. Legal acts are presumed valid; the party asserting invalidity must prove the absence of legal capacity or another ground. Mere suspicion that "something feels off" does not result in invalidation.

Q. If medical records are insufficient, is an invalidation claim impossible? A. Even where materials are insufficient, some matters are litigated based on the combined testimony of family members and caregivers and on everyday materials. However, in the absence of objective materials, recognition tends to become less likely.

Q. How does a legal-portion claim differ from an invalidation claim? A. A legal-portion claim is typically a procedure for recovering a fixed percentage, while an invalidation claim seeks to overturn the gift or will itself. Depending on the case, the two are pursued in parallel or selected one over the other.

If you suspect a particular gift or will, securing medical records is the most important first step. If you would like help organizing materials, you can chat with us now for guidance.

Claims to invalidate a gift or will executed right before death are an area where the burden of proof is heavy. We therefore strongly recommend "preparing before the dispute starts." Creating opportunities for family members to understand and align with each other while the parent is alive is the path that most reduces overall cost. Chat with us now

Authors: attorneys Roh Jongeon and Yoon Jisang Review date: 2026-05-30

This article is a summary of general family-law and inheritance information; it is not legal advice on any specific case. Conclusions can vary depending on the facts and the way evidence is composed, so please have a specific case reviewed through consultation.