Korea Identity Verification: ARC Name Mismatch Fix 2026

You try to open a bank account in an app, log into a government site, or verify your Naver account, and the screen returns "information does not match" every time. In almost every case the problem is not your Alien Registration Card (ARC, 외국인등록증) itself but the English name string your mobile carrier stored when your line was activated. This guide explains how the check works, how to find out what your carrier actually holds, and what to ask them to change.

Why identity verification keeps failing for foreigners in Korea

Korean identity verification (bon-in-injeung, 본인인증) is not run by the app you are using. Banks, Naver, Kakao, delivery platforms and government portals all hand the check off to a designated identity verification agency (bon-in-hwagin-gigwan, 본인확인기관), a category managed under the Network Act through the Korea Internet & Security Agency's identity verification portal (본인확인 지원포털 (Korean-language source)). For most residents, that agency is their mobile carrier.

That means the name, date of birth, gender, nationality flag and phone number you type into an app are compared against the subscriber record your carrier created at sign-up — not against your passport and not directly against your ARC. A Korean-language guide to foreigner PASS verification puts the core rule plainly: the name has to be entered exactly as it is registered with the carrier, because the carrier record and the passport spelling can diverge (khublife (Korean-language source)).

The PASS app, which is operated jointly by SKT, KT and LG U+, sits on top of that same carrier record and provides mobile-phone-based verification for public services, financial transactions and electronic signatures (PASS 자주 묻는 질문 (Korean-language source)). This is why the failure follows you everywhere: fix the carrier record and every downstream service usually starts working; leave it broken and no amount of reinstalling PASS will help.

For context on what the "correct" form is supposed to look like, the Ministry of the Interior and Safety issued a Standard for Transcription of Foreign Names in Administrative Documents (행정안전부 예규 제303호), as of November 2024, that took effect on 22 November 2024. It states that a foreigner's Roman-alphabet name in Korean government documents is written surname first, then given name, in capital letters, with a space between the two (MOIS (Korean-language source)). Note the limit of that rule: it covers administrative documents, and it has not been confirmed as identical to the field format a carrier stores for telecom registration.

How to check the exact English name your systems hold

There are several copies of your name, each maintained by a different organization.

Start with the two you can read yourself. Copy the English name from the front of your ARC character by character — spacing between name parts, whether a middle name appears at all, and whether it is printed in capitals. Then ask the carrier what they hold: the recommended diagnostic step for a verification failure is to ask the carrier customer center directly to confirm how your name and date of birth are stored for your foreign registration (khublife (Korean-language source)).

Users who have worked through this report that checking the stored value, instead of assuming it matches the passport, is the fastest way to diagnose a persistent failure. Write both strings down side by side before you call. The mismatch is usually visible in five seconds once you can see both.

A detailed, field-by-field public specification of how the ARC chip transmits the name string to verification agencies was not found on an official page during research for this article. Treat the carrier's stored value as the operational reference point, and confirm the ARC record itself with the immigration office or HiKorea if the card and your expectation differ.

Do these verification rules apply to you?

Answer these six questions before you spend an afternoon on customer service lines.

1. Was your Korean SIM activated using your ARC as the identity document, rather than a passport-only or tourist SIM? Passport-only holders can generally activate a prepaid (seonbul, 선불) MVNO SIM, but that usually requires in-person registration at a dealer rather than a full online sign-up (모요 (Korean-language source)).
2. Do you hold an active ARC right now, rather than sitting in the pre-ARC window after arrival while your application is processed?
3. Is your line a postpaid (hubul, 후불) contract? A number of MVNOs have opened postpaid sign-up to foreigners holding an ARC or residence card, with some plans in the 7GB to roughly 15GB range for under ₩20,000 per month, though offers vary by carrier and by date (모요).
4. If you are on an MVNO, does it run on the SKT or KT network? MVNOs on those networks are described as officially supported for PASS verification, with the instruction that you select your specific MVNO brand rather than a generic "SKT" or "KT" option during PASS registration (khublife (Korean-language source)).
5. Have you actually issued a PASS certificate, not just installed the app? PASS distinguishes a one-time identity check triggered when you enter your name and date of birth on a site from a PASS certificate (PASS 인증서) that is issued in advance inside the app after you agree to the terms and set a PIN or biometric; installing the app alone does not issue the certificate (PASS 자주 묻는 질문 (Korean-language source)).
6. Have you confirmed with the carrier customer center how your name and date of birth are stored, rather than assuming they match your passport (khublife)?

If you answered yes to all six, your problem is almost certainly a character-level mismatch in the carrier record, and the correction request in the next section is the right path. If any answer is no, deal with that item first: no ARC or a passport-only tourist SIM means carrier-based identity verification (본인인증) is not available to you, and you should confirm alternative verification options directly with the specific service you are trying to use — confirm with your bank or the relevant government portal; a missing PASS certificate means you have not finished setup; and an unclear plan type means you should confirm eligibility with your own carrier before anything else.

How to ask your carrier to correct the English name

Korean carrier customer centers are commonly reached on 114 from your own mobile line; if that does not connect, check the customer center number inside your carrier's app — confirm the correct number with your carrier. A carrier store can also open the subscriber record, and bringing the physical documents makes the conversation shorter.

1. Bring or have ready your ARC (the original card, not a photo), your passport, and the exact name string you want stored, written out with spaces marked.
2. Ask the agent to read back how your name and date of birth are currently stored on the foreign registration for your line (khublife). Do not describe what you think it should be until they have read it out.
3. Request a correction so that the stored English name matches your ARC exactly. A usable Korean sentence is: "외국인 등록 영문 이름을 외국인등록증과 동일하게 수정해 주세요." In English: "The English name on my mobile account does not match my ARC — please correct the registered name so identity verification works."
4. Ask them to check the other fields at the same time. Incorrect name order, omitted hyphens, deleted middle names and mismatched gender or nationality flags are all cited as recurring causes of foreigner verification failure (khublife (Korean-language source)).
5. Ask the agent to confirm the change in writing or in the app's subscriber details screen, and screenshot it. If the record is ever overwritten later, that screenshot is the fastest way to prove what was agreed.
6. Retry verification after the change. No official page states how long the corrected value takes to propagate to PASS, Naver or Kakao, so do not treat any figure you read online as a rule — if it still fails after a day, call the customer center back.

There is no published fee schedule comparing an in-store correction with a phone correction, and practice may differ by company and branch. Ask about any charge before you agree to the change — confirm with your carrier.

MVNO (알뜰폰) sign-up and why mismatches start there

Budget carriers, known as MVNOs (알뜰폰), resell capacity on the big three networks. Several have opened postpaid sign-up to ARC holders, and the low-cost tiers cited above start under ₩20,000 per month (모요). Foreigners with a passport only are generally limited to prepaid SIMs activated in person at a dealer (모요).

Two consequences matter for verification. First, because MVNO sign-up often runs through a store agent or a separate online flow rather than the host network's own onboarding, the English name is frequently typed by hand — which is exactly where dropped middle names and reordered segments enter the system. Second, a mismatch created at MVNO sign-up has to be corrected by that MVNO's customer center; SKT, KT and LG U+ do not hold the retail subscriber record for a line sold by another brand.

Before you apply, bring:

• Your ARC (original card).
• Your passport as a second identity document.
• The exact English name string, written out, to hand to the agent rather than spelled aloud.

Eligibility, required documents, and whether sign-up is online or in person vary by individual MVNO and by visa type, so check the current terms with the specific MVNO or through the 알뜰폰 comparison portal before you commit to a plan.

Linking Naver, Kakao and banking apps after the fix

Once the carrier record is corrected, treat each app as a fresh start rather than retrying a half-finished screen. Close the app fully, reopen it, and run the verification flow from the beginning so it re-requests the values from the carrier instead of reusing a cached failure state.

Then check the details each service asks for. When you enter your name in a verification form, use the value the carrier confirmed to you, not the passport spelling (khublife). In PASS, confirm your carrier selection matches your actual brand — selecting a generic network option instead of your MVNO brand is reported as a cause of failure even when the underlying registration is correct (khublife). And confirm that you have issued a PASS certificate if the service you are using asks for one, since the certificate is separate from a one-time identity check (PASS 자주 묻는 질문 (Korean-language source)).

If one service still fails while others now succeed, the remaining problem is on that service's side, not the carrier's. Contact that app's support with the date of the carrier correction and the confirmation screenshot you took.

Common problems and what actually fixes them

Foreign residents and Korean-language guides consistently report that the middle name is the single biggest culprit: immigration holds it as part of the name string, while the carrier record was created without it, or with a lost hyphen, or with the segments in a different order (khublife (Korean-language source)). These are community and secondary-source reports of what goes wrong in practice, not a published rule, so treat them as a checklist for your call rather than as policy.

One structural point is worth keeping in mind. Because Korean administrative documents follow the November 2024 transcription standard — surname first, given name second, capital letters, one space (MOIS, as of November 2024) — a record typed in a different style at a retail counter will not match, even when a human would read the two as the same person.

Four things could not be confirmed on an official page at the time of writing and are deliberately not given as numbers here: the propagation time from a carrier correction to PASS, Naver and Kakao; any foreigner-specific PASS correction channel separate from each carrier's own customer center; whether prepaid or particular MVNO plan tiers are categorically excluded from 본인인증; and any fee for an English name correction — confirm each of these with your own carrier.

Key takeaways

• The name that decides whether 본인인증 succeeds is the one your carrier stored at sign-up, not the one on your passport — ask the customer center to read it back before you do anything else.
• A mismatch created at an MVNO must be corrected by that MVNO's customer center, and in PASS you must select your specific MVNO brand rather than the underlying network.
• Screenshot the corrected subscriber record, then re-run verification from scratch in each app; if only one service still fails, the problem is on that service's side.

This article is for general information only and reflects sources current as of the dates cited. Rules, prices and procedures change — confirm with the official organisation linked above before acting.