If you rent an apartment in Korea, buy a used car, or hand over a large deposit, someone may pay you with a piece of paper instead of a bank transfer. It is called a 자기앞수표 (jagi-ap supyo), a cashier's check issued by a bank.
Most guides stop at "it's like cash." That is not quite right, and the difference matters when the check is a month old, or when you lose it. I read the Korean Check Act and the Civil Procedure Act line by line so this page could quote the actual provisions instead of repeating what people say in expat forums.
What a cashier's check actually is
Article 6(3) of the Check Act says this:
A check may be issued with the drawer himself/herself as the payer.
That single line is the whole idea. The bank issues the check and the bank is also the party that pays. A personal check can bounce if the drawer's account is empty. A cashier's check cannot bounce the same way, because the bank already took the money and put its own name on the paper.
That is why Koreans still use them for apartment key money, used cars, and other large one-time payments. Bank transfers have daily limits. Cashier's checks do not.
The "10-day rule" you will hear about
Someone will tell you the check expires in 10 days. The number is real, but the meaning is not what most people think. Article 29:
(1) A check issued and payable in the Republic of Korea shall be presented for payment within ten days.
(4) The periods under paragraphs (1) through (3) shall be counted from the date stated on the check.
Two things to notice.
First, the clock starts on the issue date printed on the check, not the day you received it. If someone hands you a check that was issued a week ago, you have three days left, not ten.
Second, the article says the check "shall be presented." It never says the check becomes void.
What actually happens after day 10
This is the part almost every English-language explanation gets wrong. Article 32:
(1) Revocation of an order to pay a check shall take effect only after the period of presentment has expired.
(2) If there is no revocation of the order to pay, the payer may make payment even after the period of presentment has expired.
Read paragraph (2) again. If nobody revoked the payment order, the bank may still pay after the ten days. The law says so directly.
With a cashier's check, the issuing bank is the payer, so there is rarely any reason for it to revoke its own payment order. In practice banks do honor cashier's checks well past the tenth day.
But "may pay" is not "must pay." The provision gives the bank permission, not an obligation. A late check can mean extra verification at the counter, or a branch manager wanting to call the issuing branch. There is no reason to wait.
So why does day 10 matter at all?
Because of a different right: the right of recourse. If a check is endorsed to you and payment fails, you can turn to the people who handed it along before you. Missing the presentment period weakens that. And it has its own clock, in Article 51:
(1) The right of recourse of a holder against endorsers, the drawer and other obligors shall be extinguished by prescription if not exercised within six months after the expiration of the period of presentment.
Six months counted from the end of the presentment period, not from the issue date. Ten days first, then six months.
The two deadlines, side by side
| Point in time | Provision | What it means |
|---|---|---|
| Issue date on the check | Check Act art. 29(4) | The ten days start here |
| Within 10 days | Check Act art. 29(1) | Period of presentment. Cleanest window |
| After 10 days | Check Act art. 32(2) | Bank may still pay. The check is not void |
| 6 months after that | Check Act art. 51(1) | Right of recourse is extinguished |
Checking that the paper is real, before you hand anything over
You can verify a cashier's check yourself. Korean banks put a check-inquiry menu inside internet banking. Woori Bank calls it 자기앞수표조회 (cashier's check inquiry), and it asks for:
| Field | Format |
|---|---|
| Check number (수표번호) | 8 digits |
| Issuing branch number (발행점번호) | 6–7 digits |
| Check type (수표종류) | General, or fixed-amount: 100,000 / 300,000 / 500,000 / 1,000,000 won |
| Amount (수표금액) | Only for general checks |
| Issue date (발행일) | Additional field when checking another bank's check |
The numbers are printed on the front of the check. Checks from other banks can be looked up too — with one important exception.
Some banks simply are not in the system
Woori's own notice on that page says:
Cashier's checks of banks that do not participate in the electronic banking network check-inquiry service, such as Nonghyup, cannot be inquired.
So "not found" does not mean "fake." It can simply mean the issuing bank is outside that particular inquiry network. Do not walk out of a signing because of it. Call the issuing branch instead, or better, schedule the handover during banking hours so you can confirm at a counter.
That last point is not law, just common sense. Large handovers at 9 p.m. on a Saturday give you no way to check anything.
If the digits and the written amount disagree
Korean checks carry the amount twice: in figures and in Korean characters. Article 9 decides which one wins.
(1) Where the amount of a check is written in both letters and figures and there is a discrepancy, the amount written in letters shall be the amount of the check.
(2) Where the amount of a check is written more than once in letters or figures and there is a discrepancy, the smallest amount shall be the amount of the check.
Letters beat figures, and if written repeatedly, the smallest amount wins. If you cannot read the Korean numerals yet, this is a good moment to ask the other party to read them aloud, or to photograph the check and check later.
Losing a check: step 1, tell the bank
If you lose a cashier's check, call or visit the issuing bank first. This is bank practice rather than statute, and it lets the bank flag the check if someone presents it.
But reporting the loss does not get your money back. The paper itself carries the right. To recover the value you have to have the paper declared void, and that is a court procedure.
Step 2: public summons at the court
The starting point is Article 492 of the Civil Procedure Act:
(1) The provisions of Articles 493 through 497 shall apply to public summons procedures for claiming a declaration of invalidity of securities that have been stolen, lost or destroyed, or other instruments that may be invalidated under the Commercial Act.
Article 493 says the applicant is the final holder of the instrument. And Article 476 decides where you file:
(2) In cases under Article 492, the district court of the place of performance indicated on the securities or instrument shall have jurisdiction.
(3) The jurisdiction under paragraphs (1) and (2) shall be exclusive jurisdiction.
Not the court where you live — the district court for the place of payment printed on the check. It is exclusive jurisdiction, so filing elsewhere means the case has to be moved. If you live in Seoul and the check came from a Busan branch, you file in Busan.
Article 494 requires you to submit a copy of the instrument, or otherwise establish enough detail about it. This is the practical reason to photograph any check the moment you receive it. Once it is gone you cannot photograph it.
Step 3: the three-month wait
Article 481 is short and unforgiving:
The period of public summons shall be fixed at three months after the completion of the public notice.
Three months from the completion of the public notice, not from the day you filed. With the surrounding steps, expect longer. During that window anyone holding the check can come forward, and under Article 482 a claim reported before judgment is still protected. The three months exist to make sure the paper does not really belong to someone else.
Step 4: judgment of nullification
If nobody appears, the court rules. Articles 496 and 497:
Article 496: In a judgment of nullification, the invalidity of the securities or instrument shall be declared.
Article 497: Where a judgment of nullification has been rendered, the applicant may assert the rights under the securities or instrument against the person who bears the obligation thereunder.
The lost paper becomes void, and you can assert the right against the bank. You end up holding a judgment instead of a check.
The recovery path in one table
| Step | Where | Basis | Time |
|---|---|---|---|
| Report the loss | Issuing bank | Bank practice | Immediately |
| File for public summons | District court of the place of payment | CPA arts. 476(2), 492 | Written application |
| Public notice and waiting | Court | CPA art. 481 | 3 months after notice completes |
| Judgment of nullification | Court | CPA arts. 496, 497 | After the hearing date |
What this means if you are new to Korea
Three habits cover almost everything.
When you receive one, photograph both sides on the spot, read the amount in letters as well as figures, and run the inquiry in your banking app. If it is not found, do not panic — call the issuing bank.
After you receive one, check the issue date and deposit it within ten days. Later is not fatal, but there is no upside to waiting.
If you lose one, report it to the bank, then file for a public summons at the district court for the place of payment, then wait out the three months. Having a photograph makes all of this far easier.
A note on the alternative
Cashier's checks exist because bank transfers have daily caps. If you raise your transfer limit at your bank in advance — usually with identification and sometimes proof of the transaction — many deposit and purchase situations never require paper at all. For a newcomer that is often the simpler route.
Sources
Provisions quoted above are from the Check Act (수표법) and the Civil Procedure Act (민사소송법) as published by the Korea Ministry of Government Legislation at the National Law Information Center (law.go.kr), read on 5 September 2026. The inquiry fields and the network notice are from Woori Bank's cashier's check inquiry page, read the same day.
This page explains general rules. Individual cases differ, and bank procedures vary between institutions. Confirm with the issuing bank and, for court steps, with the court before you act.
