First Midwest Bank Customer Care: How to Get Help Today

Who Handles First Midwest Customer Care Now

First Midwest Bank completed its merger with Old National Bank in early 2022, creating a combined Midwestern institution with roughly $45 billion in assets at close and a significantly expanded branch footprint across Illinois, Indiana, Iowa, Kentucky, Michigan, Minnesota, and Wisconsin. Following the legal close, client-facing systems and branding transitioned to Old National over mid‑2022. As a result, customer support for former First Midwest accounts is now delivered by Old National Bank’s Client Care Center.

If you still have First Midwest-branded checks, debit cards, or statements, you can continue using them until you receive updated materials. Most account numbers, direct deposits, and automatic payments carried over without change during the conversion. For the most current support resources, use Old National’s official channels; the former First Midwest website now redirects to Old National.

How to Reach Customer Care

The fastest way to reach a live representative for former First Midwest accounts is through Old National Bank’s Client Care Center. Identify yourself as a former First Midwest client (if asked) and have your account or debit card number ready. If you prefer not to speak by phone, secure messaging is available after you sign in to online or mobile banking. For complex issues, you can also schedule an in-branch appointment online.

Hours and staffing can vary by day and season, but the Client Care Center maintains extended weekday availability, with limited Saturday coverage, and 24/7 support for card emergencies. If you use a TTY device, dial 711 to connect via your state relay service. Avoid sending account numbers or personal data by regular email; use secure messaging or call.

• Client Care Center (Old National, serving former First Midwest clients): 800-731-2265
• Website for former First Midwest clients: https://www.oldnational.com/first-midwest
• General contact page and secure message sign-in: https://www.oldnational.com/contact
• Branch and ATM locator (search by ZIP or city): https://www.oldnational.com/locations
• Corporate address (Old National Bank Center): One Main Street, Evansville, IN 47708
• Former First Midwest Chicago HQ (for reference, not a service counter): 8750 W Bryn Mawr Ave, Chicago, IL 60631

Online and Mobile Support

Former First Midwest clients now sign in at Old National’s digital banking platform. If you were prompted to re-enroll during the conversion, you’ll use your Social Security number or Tax ID, account details, and a one-time verification code to finalize access. Two-factor authentication (via text, call, or authenticator app) is required for security-sensitive actions. You can enroll directly from the sign-in page on desktop or by installing the Old National Mobile app from the Apple App Store or Google Play.

Once signed in, you can view balances and transactions, download statements, set debit card travel notices, manage account alerts, and initiate transfers, Zelle payments, bill payments, and stop payments. For most requests—such as address changes, adding beneficiaries, ordering checks, or disputing a card transaction—secure message threads create a time-stamped record that support agents can track and escalate if needed.

Cards, Fraud, and Security

If your debit card is lost or stolen, lock it immediately using the Card Controls feature in the Old National Mobile app, then contact the Client Care Center at 800-731-2265 and follow the prompts for card support. Replacements can be mailed, and select branches may offer instant-issue cards; check the locator for availability. For suspicious transactions, freeze the card first, then review recent activity and note any unauthorized charges and dates.

Disputes on unauthorized electronic transactions (debit cards or ACH) are protected under Regulation E. After you report a suspected error, banks generally provide provisional credit within 10 business days (up to 20 business days for new accounts), with a typical full investigation window of up to 45 days. Credit card billing disputes fall under Regulation Z; the bank must resolve within two billing cycles (not more than 90 days). Keep your case number, respond promptly to documentation requests, and check your secure messages for updates.

Business and Treasury Management Clients

Commercial, treasury, and business online banking users from First Midwest were migrated to Old National’s treasury platforms during the 2022 conversion. If you manage ACH origination, wires, Positive Pay, or Remote Deposit Capture, verify your users, entitlements, and daily limits in the new system before your next processing day. Old National provides training guides and, when needed, one-on-one onboarding support to map former templates and reporting to the current platform.

For time-sensitive items (payroll files, wire cutoffs, or ACH returns), submit via the new platform and confirm approvals well ahead of your deadlines. If something is urgent—like a same-day ACH or an international wire—call the Client Care Center and request transfer to commercial support. Keep your Company ID, location code (if applicable), and recent template names handy to speed troubleshooting.

Branch and ATM Access

Old National now operates the combined branch network for former First Midwest markets. Use the locator to confirm lobby and drive-up hours, services (notary, safe deposit box access, instant-issue debit), and whether appointments are recommended. Hours vary by location and season, and some urban branches offer extended weekday or lunchtime hours.

For surcharge-free ATM access, check the locator filters to identify in-network machines. Many personal checking packages waive Old National fees for out-of-network withdrawals or reimburse a set number of foreign ATM surcharges per statement cycle; consult your specific account disclosures for reimbursement caps and posting timelines. If a fee reimbursement doesn’t appear as expected, send a secure message with the ATM location, date, and receipt image.

Service Metrics and Escalation

Most day-to-day issues—password resets, card replacements, address changes, and basic disputes—are resolved in a single interaction or within one to two business days after documentation is received. Longer timelines apply to fraud claims, mailed check research, or third-party investigations. Always request and retain your case number; it’s the fastest way for any agent to retrieve history and status.

If you do not receive an update by the date provided, call with your case number and ask for a supervisor review. For unresolved matters after escalation, you can submit a written complaint via secure message or the website contact form. As an additional avenue for consumer accounts, you may file a complaint with the Consumer Financial Protection Bureau at https://www.consumerfinance.gov/complaint; you’ll receive a tracking number, and the bank is required to respond.

What to Have Ready Before You Call

Preparing specific details shortens resolution time and helps customer care document your request correctly. For identity verification, have your government-issued ID and the last four digits of your SSN or Tax ID available. For transaction-related issues, note exact amounts, dates, and merchant names.

• Account and card details: full account number (or last 4), debit/credit card last 4, and the name on the account
• Transaction evidence: receipts, screenshots, merchant correspondence, and the date/time and dollar amounts in question
• Digital access info: device type, app version, browser and version, and any error codes you saw
• For fraud: when you noticed the activity, when you last had the card, and any police report or identity theft affidavit (if filed)
• For business services: Company ID, user IDs requiring changes, and template names/IDs for ACH or wires

Key Takeaways for Former First Midwest Clients

Your customer care is now provided by Old National Bank. Start at https://www.oldnational.com/first-midwest for tailored guidance and use 800-731-2265 for phone support. Secure messaging within online or mobile banking is the best channel for non-urgent requests that require document uploads or written confirmations.

For urgent card issues, lock your card in the app and call immediately. For disputes, note federal timelines (Reg E and Reg Z) and keep your case number. Use the locator to verify branch services before visiting, and consult your account disclosures for fee and reimbursement details. If a matter isn’t resolved after escalation, you can seek assistance through the CFPB’s complaint portal.

What is the phone number for Midwest Bankcentre 24 hour customer service?

(314) 631-5500
Online Request: You can complete our online request form and one of our bankers will reach out to assist, or you can speak with someone directly at (314) 631-5500 or toll free (800) 894-1350.

How do I contact one bank customer service?

Phone: We can be reached at +1 (855) 830-6200 from 9 a.m. to 9 p.m. ET, 7 days a week. Email: Submit an email to us by clicking here.

What is the phone number for bank First 24 hour customer service?

Questions? Contact a customer service representative at your nearest location or call (920) 652-3100.

What happened to the first Midwest bank?

In June 2021, Old National announced a merger of equals with First Midwest Bank, a Chicago-based financial institution. This merger was officially completed in February 2022, nearly doubling Old National’s asset size.