As will-related disputes among family members have increased, inquiries about handwritten wills, notarized wills, and the will-substitute trust that financial institutions have recently been actively promoting have grown noticeably. All three are means of designating where assets go after death, but they differ in drafting procedure, strength of effect, likelihood of dispute, and scope of use. This article puts the three on the same table and organizes which approach suits which kind of person.
Why a will is needed, in one line
Most intra-family will disputes arise because the deceased's intent was not clearly recorded. There are circumstances such as "our parents said in their lifetime they wanted to give this house to the eldest son," but there is no legal way to prove it. The split that opens up within the family then becomes the dispute itself.
Reasons to accurately understand will methods and their uses:
- The final intent of the deceased can be stably realized.
- Intra-family inheritance disputes can be prevented in advance.
- Unnecessary litigation time and cost can be reduced.
This article focuses on the three methods most often used in everyday practice: the handwritten will, the notarized will, and the will-substitute trust. Other will forms such as the secret instrument, oral instrument, and recording are also set out in law but are used with low frequency in general practice.
The three methods at a glance
| Item | Handwritten will | Notarized will | Will-substitute trust |
|---|---|---|---|
| Author | The principal alone | Principal + notary + 2 witnesses | Principal + trustee institution |
| Procedure | Written by hand, must meet certain formalities | Visit to notarial office | Trust contract |
| When effect arises | At death | At death | From the contract or transfer onward, in stages |
| Risk of formal defect | High (invalid if requirements missing) | Low (notary reviews) | Low (contract-based) |
| Probate procedure | Required | Not required | Not required |
| Likelihood of post-death dispute | High over forgery, alteration, authenticity | Relatively low | Very low |
| Cost | Lowest | Medium (notarial fee) | Highest (trust fee) |
| Restriction on divisible assets | Almost none | Almost none | Within the scope of trust assets |
Summarized in one line, the handwritten will is easiest but carries the largest dispute risk; the notarized will is the most legally stable middle option; the will-substitute trust suits those with substantial assets who want to design post-death management carefully.
Handwritten will, the most common but most often invalid
A handwritten will is one drafted entirely by the principal without anyone's help. The law requires the following five elements together.
- Write the entire text of the will by hand
- State the year, month, and day of writing
- State the address
- State the name by hand
- Affix a seal
The most common invalid cases I see in the consultation room are missing or inaccurate address, missing date, and missing seal. A will typed on a word processor with only a handwritten signature is also invalid. If any of the five elements is missing, the will itself loses effect.
Another risk is post-death authenticity dispute. Because a handwritten will is a document drafted solely by the principal, after death the other heirs frequently raise disputes claiming the handwriting is suspicious, the principal lacked testamentary capacity at the time, or the will was coerced. The litigation lengthens through handwriting analysis, review of medical records, and so on.
A handwritten will is the cheapest, but once the cost of post-death disputes is added, it can become the most expensive method.
Notarized will, close to the standard for dispute prevention
A notarized will is executed at a notarial office, in the presence of a notary, together with two witnesses. Because the notary directly confirms the testator's true intent and testamentary capacity and reviews the statutory formalities directly, the risk of invalidity due to formal defects is very low.
Features in summary:
- The notary reviews formal requirements directly, so the possibility of invalidity is low.
- The original is held at the notarial office, so the risk of loss is small.
- Post-death probate is not required, so estate execution is swift.
- The procedure including two witnesses is somewhat cumbersome and notarial fees arise.
I tend to recommend a notarized will rather than a handwritten one to those for whom any post-death dispute risk can be anticipated, even slightly. The cost is higher, but the meaningful reduction in post-death dispute risk is significant.
Will-substitute trust, suited to those with substantial assets and post-death management needs
In a will-substitute trust, the principal enters into a trust contract with a financial institution or other trustee while still alive, and predetermines how the trust assets will be managed and distributed after death. After death, the trust assets are distributed to the designated beneficiaries in stages.
Features distinguishing it from the other two methods:
- Staged distribution is possible. Rather than handing over all assets at once, designs such as distributing a set amount monthly or annually are possible. Particularly useful for minor children, children with disabilities, or children where wasteful spending is a concern.
- Post-death management can be delegated. Because the trustee institution manages the assets and distributes them under set conditions, direct disputes among family members tend to decrease.
- The risk of statutory formal defect is low. Because it is contract-based, the chance of invalidity from missing requirements, as with a handwritten will, is almost none.
- Mandatory rules such as legal portion still apply. Being a trust does not make one entirely free from legal-portion claims.
That said, costs such as trust fees are higher than the other methods, and effect arises only for the portion transferred into trust, so it is hard to settle all assets at once. Suited to those whose asset scale is above a certain level and whose post-death management needs are clear.
Which method should you choose
Simplifying the selection criteria for the three methods helps.
- For those with low dispute risk who want to save cost: a handwritten will is acceptable. However, the five formal requirements must be met precisely, and a copy should be shared in advance with a trusted child.
- For those for whom post-death disputes are somewhat anticipated: a notarized will is recommended. The dispute-prevention effect is reasonable relative to cost.
- For those with substantial assets requiring staged post-death management: a will-substitute trust can be considered. Because design integrated with mandatory rules such as legal portion is required, collaboration between an attorney and the trustee institution is recommended.
- For combining multiple methods: arrangements such as real estate by notarized will, financial assets by trust, and miscellaneous movables by handwritten will are also frequently used in practice.
No single method is the right answer. Which approach fits depends on asset composition, family structure, and the need for post-death management.
Frequently asked questions
Q. Where should a handwritten will be kept? A. There is no legally designated place of safekeeping. However, if the will is not found after death, it has no effect, so it is safer to inform a trusted family member or an attorney that the will exists. After death, the will must go through the family court's probate procedure before its effect is settled.
Q. About how much does a notarized will cost? A. The notarial fee is calculated based on the value of the will's subject property. It generally falls within a range of several hundred thousand to several million won. Requesting an estimate from the notarial office in advance will confirm the exact amount.
Q. Can a will-substitute trust avoid legal-portion claims? A. No. Assets in a will-substitute trust may also be considered together when calculating the estate at the time of death and the legal portion. That said, because the post-death management and dispute-prevention effects are clear, using it together with separate legal-portion design is safer.
In closing
The handwritten will, notarized will, and will-substitute trust are all means of determining where assets go after death, but they differ in procedure, strength of effect, likelihood of dispute, and scope of use. The handwritten will is easiest but carries the risk of formal defect and authenticity dispute; the notarized will is close to a standard with high stability; the will-substitute trust suits those with substantial assets and post-death management needs. I recommend selecting one method or a combination according to your own asset composition, family structure, and post-death management needs.
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Written by Attorney Yoon Ji-sang of Jonjae Law Firm · Last reviewed 2026-05-30
This article is for general legal information and does not guarantee the outcome of any individual case. Because the choice of will method may vary by asset composition and family structure, specific matters should be consulted with an attorney separately.
