Definition
In Korea, the confirmed date stamp (hwakjeong ilja) is a system under Korean housing lease law where a public office stamps a date on your jeonse or monthly rent contract. It officially confirms that the contract existed at least by that day, and it helps set the order in which you get your deposit back if the home is sold at a court auction.
A public office remembers the date for you
Think of the postmark on a package. That one stamp settles when the package was sent, with no arguing. A rental contract needs a stamp like that too.
When a home goes to a court auction, everyone who is owed money lines up. Banks, tenants, and other creditors all pile in. Who gets paid first depends on which right came first, by date.
A lease is just a piece of paper written by the landlord and the tenant, so the date could be changed later. That's why a community service center (jumin center) or a property registry office checks the contract and stamps that day's date on it. You can also get it online through the Internet Registry Office.
With this stamp, it's very hard to dispute that the contract existed at least by that day. It's like getting your own number ticket for the line.
The stamp alone doesn't have power
Here's what many people miss. You might think the date stamp alone will protect your deposit, but it won't. You need two more things.
First, you actually have to move in and live there. Second, you have to file a move-in report (jeonip singo) to register your new address. Once you have both, you gain the power to stay in the home for the full contract term, even if the landlord changes. This power is called "opposing power" (daehangnyeok).
Only when the date stamp is added on top of that opposing power do you earn the right to be paid your deposit ahead of others from the auction proceeds. This is called the "priority repayment right" (usun byeonjegwon). If even one of the three is missing, you get pushed back in line.
The opposing power from your move-in report takes effect at 12:00 a.m. the day after you file. So your place in the repayment order is based on whichever is later: that moment or the date of your stamp.
A bit more precisely
To be more precise, this stamp is not a guarantee that you'll get your deposit back. It's a tool that moves you up in a line where several people share the money. If the home sells for less than the debts attached to it, even a front spot may not get you everything.
Your main rival for position is usually the bank. If a bank's mortgage (geun-jeodang) on the home was registered before your rights began, the bank gets paid first. You can see how much earlier debt exists by checking the property registry record (deunggi buldeungbon).
No matter how long your contract has left, if you move out or change your registered address, you lose both your opposing power and your priority repayment right. That's true even if you already got the date stamp. For cases where you have to leave without getting your deposit back, there's a system called a leasehold registration order (imchagwon deunggi myeongnyeong). Once that registration is complete, your opposing power and priority repayment right stay in place even after you move out.
The detailed conditions of these systems change from time to time as laws are revised.
Common misconceptions
If you just get the confirmed date stamp, your deposit is safe.
The date stamp alone isn't enough. You also have to actually live in the home and file your move-in report to earn the right to move up in line at an auction.
Getting the confirmed date stamp guarantees you'll get your full deposit back.
It only sets the order of repayment. After earlier debts are paid from the sale price, you may not get the rest of your deposit if there isn't enough money.
Where you meet it
On moving day, you file your move-in report at the community service center and get the date stamp on your contract at the same time.
When a home goes to auction, a tenant whose date comes before the bank's mortgage gets paid their deposit first.
In one sentence
By getting a public office's date stamp on your lease, you move up your place in line for getting your deposit back at an auction.