Summary
Most rent payment failures originate at your card-issuing bank, not at Enkostay. The two most common causes are fraud-detection blocks (FDS) and insufficient overseas-use limits or balance. Because the decision is made by your bank, the fastest path to a successful charge is to contact your card issuer's customer service directly. This guide explains the decline codes you may see, how FDS works, the exact steps to clear the block, and what happens — both operationally and contractually — if the unpaid balance continues.
1. Where does a payment failure actually occur?
Enkostay's automatic billing flows in this order:
- On the scheduled payment date, our system requests a charge on your registered card.
- The request passes through a payment gateway to your card-issuing bank.
- Your bank either approves or declines.
- The decline reason code is recorded in your payment history exactly as the bank returned it.
In nearly all failed-payment cases, the decision is made by your bank, not by Enkostay. We cannot override or bypass the bank's decision.
2. Decline reason codes — what they mean and what to do
| Code | Bank's stated reason | What it really means | First action |
|---|---|---|---|
| G0 | "Refer to card issuer" | Your bank is questioning the transaction itself (often an FDS block, suspected loss/theft flag, or another internal reason) | Call your card issuer's customer service and ask why the charge was declined and how to clear it |
| G2 | "Overseas card authorization declined" | Your bank classified the charge as an international transaction and blocked it. Most common causes: FDS, or international use is not enabled | Call your card issuer and (1) confirm international use is enabled, (2) request that the FDS block on Enkostay charges be released |
| A8 | "Credit limit exceeded or insufficient balance" | At the moment of the charge, your bank evaluated your available credit or balance as insufficient | Verify your available limit and balance — note that overseas-use limits are often managed separately from domestic limits |
| Other | — | Many other codes can appear | Capture the decline message and ask your card issuer to interpret it |
Important: When several payment attempts fail in a row, the reason often differs between attempts. Resolving one cause does not guarantee the next attempt will succeed. Check the decline code for every failed attempt, not only the most recent one.
3. What is FDS, and why does it block legitimate payments?
FDS (Fraud Detection System) is an automated security layer operated by your card-issuing bank. It blocks transactions whose pattern looks unusual compared to your normal usage — even when you, the genuine cardholder, are the one initiating the payment.
FDS evaluates patterns, not identity. A transaction can be blocked when:
- A card normally used in your home country is suddenly charged in Korea
- A charge occurs at an unusual time (for example, a recurring charge that runs in the early morning)
- A larger-than-usual amount is charged at a merchant you have never used before
- Multiple charges are attempted within a short time window
Enkostay rent charges combine three signals — a foreign-issued card, a Korean merchant, and a scheduled recurring debit — that some banks' FDS systems mistakenly classify as suspicious.
4. Step-by-step resolution
Step 1. Identify which card failed and why.
In your Enkostay payment history, locate the failed attempt(s), the last four digits of the card, and the decline code. If multiple cards are registered, note that the reason may differ per card.
Step 2. Call the customer service line of the card-issuing bank.
The number is on the back of the card or in your bank's mobile app. Most issuers offer 24-hour support.
Step 3. Make the following requests, in this order.
- Complete identity verification with the agent.
- State clearly: "I am attempting a recurring monthly rent payment to Enkostay in Korea, and the charge is being declined."
- Ask whether international (overseas) transactions are enabled on the card. If they are not, request activation.
- Ask whether the transaction was blocked by FDS (Fraud Detection System). If yes, request that the FDS block on Enkostay / Korea charges be released.
- Confirm that the per-transaction and daily overseas-use limits are sufficient for the rent amount. (These are commonly separate from your domestic limits.)
- If your bank offers it, register a travel notice or overseas-use pre-registration for Korea.
Step 4. Reply to Enkostay once your call is complete.
Reply on the same support channel and let us know you have spoken with your bank. We will monitor the next scheduled retry.
5. Frequently asked questions
Q1. My card has plenty of money, but the decline code is A8 ("limit exceeded"). Why?
Your domestic balance can be sufficient while your overseas-use limit — which most banks manage separately — is not. Some issuers also apply different authorization thresholds to international charges. Ask your bank specifically about the overseas (international) usage limit on the card.
Q2. I tried multiple cards and all of them failed. Can I pay through a different method?
The standard payment method is the automatic billing card registered on your contract. If you need to change cards, please use the payment-method change flow to register a new card. For exceptional situations where no card you hold can be authorized, contact customer support and we will guide you on the next steps.
Q3. My bank says they did not block anything.
With G0 or G2 codes, first-line agents may not see the FDS log immediately. Try the following: (1) "Please look up the declined international transaction at this time," (2) "Please ask the security/fraud team whether FDS triggered a block," (3) provide the exact decline time and the merchant name (Enkostay or the payment processor) shown in your Enkostay payment history.
Q4. Can I use a VPN while paying?
Not recommended. A VPN can cause your card's issuing country and the payment's apparent location to mismatch, which often increases the likelihood of an FDS block.
Q5. What if my bank cannot resolve the issue?
You may register a different card. Be aware that issuer-side restrictions are evaluated per card, so a new card may be declined for the same underlying reason if it is issued by a similar institution. We recommend speaking with your bank first before adding a new card.
6. What happens if the unpaid balance continues?
When rent goes unpaid, two procedures run in parallel. One is Enkostay's operational collection process. The other is the consequences defined under the Tenant Policy. Both apply even when the failure was caused by your card issuer rather than by you.
6-1. Enkostay's automatic 5-stage collection procedure
If automatic retries and automatic notifications do not resolve the unpaid balance, the following 5-stage procedure runs automatically.
| Stage | Timing | What happens |
|---|---|---|
| Stage 1 | D+1 | The first written warning is sent automatically. If the cause is identified as a card-issuer issue, you are instructed to contact the issuing bank directly and resolve it immediately. |
| Stage 2 | From 00:00 KST on the day after D+1 | The system automatically retries the charge and continues retrying until the collection procedure closes. |
| Stage 3 | D+3 | Notification is sent to the host (KakaoTalk Alimtalk), explaining the situation and the response stages that follow. |
| Stage 4 | D+5 | A dedicated collection manager is assigned. |
| Stage 5 | D+N | If the tenant explicitly refuses to make payment, or if the payment delinquency continues without resolution, a pre-notification of forced move-out will be issued and the relevant procedure will commence. |
6-2. Consequences under the Tenant Policy
| Days past scheduled payment date | Stage | Action applied |
|---|---|---|
| From D+8 | Late status | Late-payment interest of 5% per annum begins to accrue on the unpaid amount, calculated daily |
| At D+14 | Material breach | Certain platform services may be restricted; the host is informed of the contract-termination procedure |
| Until the next scheduled payment date without resolution | Termination procedure | A formal contract-termination notice may be issued under Article 640 of the Korean Civil Act |
Enkostay may take reasonable measures to recover the outstanding balance, including re-attempting the registered payment method, sending overdue notices, and applying account restrictions, in accordance with the Tenant Policy. If you keep Enkostay informed of your progress with your bank, that information will be considered as the collection procedure proceeds.
7. Need more help?
- Email: stay_support@enko.kr
- Support hours: weekdays 10:00–17:00 KST
- If your card issuer has confirmed the block was released and the next charge still fails, please reply to your existing inquiry with the decline code, the time of your call, and what the bank told you. We will guide the next step.