Checking the Official Notice First After a Merger
When a bank or securities firm merges, the most reliable starting point is the official notice that the institution itself publishes. Mergers are announced well in advance on the main website of the old firm, often under a banner labeled "Merger Notice," "Integration Guide," or "Service Change." This notice typically includes the exact date when the old login page stops working and the new service name or URL where customers must go next. If you have access to your old firm's website, check the top banner, the footer, or a dedicated "Notice" or "Announcements" section before doing anything else. The notice will also list which account numbers, login IDs, and security methods carry over and which ones change.
If you cannot find the notice on the old website because the page has already redirected or shut down, search using the old firm's full legal name plus words like "merger," "integration," or "new login page." Official press releases or the new firm's integration microsite usually appear in the first few search results. Avoid clicking ads or third-party link directories; only use results that clearly match the new firm's official domain name. Bookmark the new official site once you confirm it, and do not rely on saved bookmarks from before the merger, because the old URL may now point to a parked page or a phishing trap.
Identifying the New Login Page and Account Mapping
Once you have the new firm's official website, look for a login area that mentions the merged institution by name. Many merged services create a dedicated login portal labeled "Former [Old Firm Name] Customers" or "Integration Account Login." This portal often asks for your old account number or a new integrated ID that was mailed or emailed to you before the merger. If you have not received a new ID, check the "Find ID" or "Account Lookup" feature on the new login page. You will usually need your old account number, your registered phone number, and your resident registration number or a security certificate to retrieve it.
Do not assume that your old password still works on the new page. Mergers often reset or migrate passwords, and you may need to set a new one through a "First Login" or "Password Reset" flow. Before you try logging in, confirm that you are on the correct login page by checking the URL. The official domain should match the new firm's name, not a variation like "new-bank-login.com" or "secure-old-firm.net." If the page asks for sensitive information like your full account password or PIN before showing a notice or a login button, leave the page immediately and contact the new firm's official customer service number from a statement or a previous notice.
Comparing Old and New Login Requirements
After a merger, the login method and security steps often change. The table below helps you check the most common differences between your old login page and the new one so you can avoid failed login attempts or security lockouts.
What to Check Visible Label or Place Next Action
Login ID format Login ID field on the new page If the field asks for a numeric ID but you have an alphanumeric one, look for a “Former Customer Login” option or call support to get the correct ID format.
Password reset requirement Login button or “Forgot Password” link If the login button is grayed out or redirects to a reset page, complete the password reset before trying to log in; do not reuse your old password.
Security certificate or OTP Security step page after entering ID and password If the new page asks for a certificate you do not have, check the “Certificate Issuance” or “OTP Registration” link on the same page and follow the registration steps.
The table above covers the three most common friction points. If you pass all three checks and still cannot log in, the next step is to verify that your account was actually migrated. Some accounts, especially those with linked loans, foreign currency holdings, or dormant status, may be migrated in a later batch. In that case, the new login page will show a "Customer Not Found" or "Account Not Migrated" message. Write down the exact error message and contact the new firm's integration support team with your old account number ready.
Handling Missing Features and Re-registering Security Tools
After a successful first login, many users find that familiar features like fund transfers, bill pay, or foreign exchange screens are missing or renamed. This is normal after a merger because the new firm consolidates platforms. Look for a "Menu" or "All Services" tab and search using the old feature name. For example, if you used to click "Foreign Remittance," try searching for "International Transfer" or "Wire Transfer" in the new menu. If the feature is still missing, the new firm may have moved it to a separate platform or a different tab labeled "Legacy Services" or "Former Bank Services." Do not assume the feature is gone; check the help section or the "Service Integration Notice" page first.
Security tools such as the OTP app, security card, or public certificate also need re-registration after a merger. The new firm usually sends instructions for re-registering your security tool within a few days of the migration date. If you did not receive these instructions, log in to the new platform and navigate to "Security Settings" or "Login Security." Look for a "Re-register OTP" or "Register New Security Card" option. If you try to use your old security tool without re-registering, the login will fail or show a "Security Device Not Recognized" error. In that case, use the alternative verification method, such as a phone call or SMS OTP, to access the security settings page and complete the re-registration. Keep your old security card or OTP device until you confirm that the new one works, because some firms allow a grace period where both methods are valid.