Comerica Bank Customer Service, Fraud and Account Help

Comerica Bank customer service provides assistance with checking and savings accounts, debit and ATM cards, credit cards, online and mobile banking, unauthorized transactions, identity theft, consumer loans, business banking, treasury management and complaints.

The primary Comerica Bank customer service phone number is 1-800-266-3742. Comerica now operates as a division of Fifth Third Bank, N.A., but customers should continue using their current Comerica support channels until their accounts transition to Fifth Third systems.

How to Contact Comerica Bank Customer Service

• General Customer Service and Account Support: 1-800-266-3742
• Debit and ATM Card Service: 1-800-572-6620
• Debit Card Support Outside the United States and Canada: 1-734-632-5181
• Personal Credit Cards: 1-866-486-1015
• Business Credit Cards: 1-866-486-1017
• Web Banking and Online Account Security: 1-888-444-9876
• Treasury Management: 1-800-852-3649
• Existing Consumer Loans: 1-855-451-9201
• New Mortgage Applications: 1-800-867-5188
• Corporate Quality Process Department: 1-313-222-3435
• Branch and ATM Locator: Find a Comerica location

Comerica Bank Customer Service Hours

Comerica’s automated telephone banking service at 1-800-266-3742 is available 24 hours a day. Customers can use the automated system for services such as balances, transaction history, transfers, stop-payment requests, card problems and password resets.

Comerica lists live customer-service representatives as available:

• Monday-Friday: 8:00 a.m.-9:00 p.m. Eastern Time
• Saturday: 8:00 a.m.-5:00 p.m. Eastern Time

Debit and ATM card support at 1-800-572-6620 is available 24/7. Department and holiday hours may vary.

Debit and ATM Card Support

Call Comerica Card Services at 1-800-572-6620 for:

• A lost or stolen debit or ATM card
• Unauthorized debit-card purchases
• ATM deposit or withdrawal problems
• A declined, damaged or inactive card
• PIN assistance
• Travel notifications
• A replacement card

Lost and stolen card assistance is available 24/7. Customers calling from outside the United States or Canada can use 1-734-632-5181.

Comerica Credit Card Customer Service

Comerica credit cards are serviced by Elan Financial Services. Use the number for your card type:

• Personal Comerica Credit Cards: 1-866-486-1015
• Business Comerica Credit Cards: 1-866-486-1017

Lost or stolen credit cards should be reported immediately. The telephone number printed on the back of the card or the latest statement is also an appropriate contact route.

Comerica Web Banking and Mobile Banking Support

For Comerica Web Banking, mobile banking, Zelle, login problems, password resets or a potentially compromised online account, call 1-888-444-9876.

Customers can use Comerica online and mobile banking to view transactions, transfer money, deposit eligible checks, manage alerts and send secure messages. Access the bank through Comerica.com or its official mobile application instead of links received in unexpected messages.

Zelle Payments

Comerica advises customers to send Zelle payments only to people they know and trust. Payments sent to an enrolled recipient generally cannot be canceled. If you sent money to the wrong person or believe a Zelle payment involved a scam, call 1-888-444-9876 immediately.

Report Comerica Fraud or Identity Theft

Act promptly if you notice an unfamiliar transaction, lose a card or believe someone obtained access to your account.

• Lost or Stolen Debit Card: 1-800-572-6620
• Compromised Web Banking Account: 1-888-444-9876
• Suspected Identity Theft: 1-877-881-8955, Monday-Friday, 8:00 a.m.-8:00 p.m. ET
• Treasury Management Fraud: 1-800-852-3649
• Official Fraud Instructions: Report suspected fraud to Comerica

Suspicious emails that appear to come from Comerica can be forwarded to ReportFraud@comerica.com. Do not click links, download attachments or reply to the original message.

Consumer Loan and Mortgage Assistance

• Existing Consumer Loan Questions: 1-855-451-9201, Monday-Friday, 7:00 a.m.-7:00 p.m. ET
• Consumer Loan Disaster Assistance: 1-855-770-7841, Monday-Friday, 8:00 a.m.-5:00 p.m. ET
• New Mortgage or Refinance Application: 1-800-867-5188

Fifth Third states that it will become the servicer for existing Comerica mortgages beginning September 1, 2026. Mortgage customers should review their official transition package for their new account number, payment address and customer-service information before changing bill-pay instructions.

Do not send a mortgage or consumer-loan payment to an address found in an unsolicited message. Verify payment instructions against a current statement or official transition notice.

Direct Express and Comerica Workplace Cards

Direct Express cardholders should continue using their Direct Express card and existing services. Call the number printed on the back of the Direct Express card or visit USDirectExpress.com for current program support.

Comerica Workplace Card customers can call 1-800-759-9610 for 24/7 cardholder support or to report a Workplace Card lost or stolen. This number is specifically for the Comerica Workplace Card and is not general checking-account support.

Comerica Business and Treasury Management Support

Comerica Business Connect and Treasury Management customers can call 1-800-852-3649, Monday-Friday, 8:00 a.m.-8:00 p.m. ET. Existing business-loan customers can also contact their assigned relationship manager or local Comerica banking center.

Comerica and Fifth Third Transition

Fifth Third completed its merger with Comerica in February 2026. The banks are legally one institution, but Comerica customers continue to use Comerica-branded services during the systems transition.

The current transition schedule says:

• Comerica accounts are scheduled to transition to Fifth Third on Tuesday, September 8, 2026.
• Some online and mobile services may be temporarily unavailable from September 4 through September 7.
• Existing checking and savings account numbers and routing numbers are expected to continue working.
• Existing Comerica checks and debit cards are expected to continue working after the transition.
• Fifth Third online and mobile banking login information is expected to be mailed to applicable customers in late August.
• Customers should follow the instructions in their individual welcome packages because products and account arrangements can differ.

Visit the official Fifth Third Welcome Center for Comerica customers for the latest transition dates and instructions.

How to File a Complaint With Comerica Bank

Start with Comerica customer service at 1-800-266-3742. Explain the problem, provide the relevant dates and transactions, and request a case or reference number.

For an unresolved consumer complaint, contact Comerica’s Corporate Quality Process Department:

• Telephone: 1-313-222-3435
• Mail: Comerica Bank, Corporate Quality Process Department – MC 3232, P.O. Box 75000, Detroit, MI 48275

Include a concise timeline, previous case numbers, the product involved and the resolution you are requesting. Send copies rather than original documents and mask unnecessary account information.

External Banking Complaint Options

Because Comerica is now a division of Fifth Third Bank, N.A., customers with unresolved national-bank complaints can contact the Office of the Comptroller of the Currency. The OCC recommends contacting the bank first.

• File an OCC national-bank complaint
• OCC Customer Assistance: 1-800-613-6743, Monday-Friday, 8:00 a.m.-8:00 p.m. ET
• Submit a CFPB complaint

The appropriate regulator can depend on the financial product and the nature of the complaint. These agencies do not replace the need to report an active unauthorized transaction directly to the bank immediately.

Information to Have Before Contacting Comerica

• Your name and verified contact information
• The type of account or card involved
• A partially masked account or card number
• The dates and amounts of disputed transactions
• Previous case or confirmation numbers
• Names of representatives previously contacted
• Copies of relevant statements, receipts or correspondence
• A clear description of the resolution you are requesting

Never publish a complete account number, card number, Social Security number, PIN, password or security code in a public review.

Comerica Bank Customer Reviews

Customers may use the review section below to describe their experiences with Comerica customer service, branches, account access, cards, fraud claims, fees, online banking, loans or the Fifth Third transition.

Reviews should describe firsthand experiences and should not contain confidential financial information. CustomerServiceNumbers.com cannot access Comerica accounts, investigate transactions, release funds or change bank records.

Frequently Asked Questions About Comerica Bank Customer Service

What is the Comerica Bank customer service phone number?

The main Comerica Bank customer service number is 1-800-266-3742. Automated telephone banking is available 24/7. Representatives are available Monday-Friday, 8:00 a.m.-9:00 p.m. ET, and Saturday, 8:00 a.m.-5:00 p.m. ET.

How do I report a lost or stolen Comerica debit card?

Call Comerica Card Services immediately at 1-800-572-6620. Lost and stolen debit-card assistance is available 24 hours a day.

What is the Comerica Web Banking support number?

Call 1-888-444-9876 for Web Banking, mobile banking, login, Zelle and online-account security assistance.

How do I contact Comerica about identity theft?

Comerica lists 1-877-881-8955 for customers who suspect identity theft. The listed hours are Monday-Friday, 8:00 a.m.-8:00 p.m. ET. Report unauthorized card transactions through the applicable card-support number immediately.

Is Comerica now part of Fifth Third Bank?

Yes. Fifth Third completed its merger with Comerica in February 2026, and Comerica is now a division of Fifth Third Bank, N.A.

When will Comerica accounts move to Fifth Third?

The banks currently plan to transition Comerica accounts to Fifth Third on September 8, 2026. Until then, customers should continue using their current Comerica banking channels unless they receive verified instructions for a specific product.

Will my Comerica debit card and checks continue working?

Fifth Third says existing Comerica debit cards and checks will continue to work after the September transition. Customers should nevertheless read their individual welcome packages for product-specific instructions.

Can a Zelle payment made through Comerica be canceled?

A payment sent to a recipient who is already enrolled with Zelle generally cannot be canceled. Call 1-888-444-9876 immediately if you sent money to the wrong person or believe a transfer involved a scam.

Where can I complain if Comerica does not resolve my problem?

Escalate through Comerica’s Corporate Quality Process Department at 1-313-222-3435. Eligible unresolved consumer-banking complaints may also be submitted to the OCC or Consumer Financial Protection Bureau.

Is CustomerServiceNumbers.com affiliated with Comerica or Fifth Third?

No. CustomerServiceNumbers.com is an independent customer-service information and review website. It is not affiliated with Comerica Bank, Fifth Third Bank, Elan Financial Services, Direct Express, Zelle, the OCC, the CFPB or any related organization.

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Independent information notice: CustomerServiceNumbers.com publishes customer-service contact information and consumer guidance for informational purposes. It cannot access accounts, transfer funds, reverse transactions, approve claims or provide banking, investment, legal or tax advice. Verify time-sensitive instructions through the bank’s official website, a current statement or the telephone number printed on your card.

Last reviewed and updated: August 5, 2026.