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PO Box 41314
Houston, TX 77241-1314
PLEASE NOTE: Allegiance Bank will never request that you provide personal or financial information via unsecured e-mail. Please report to us any suspicious e-mails you receive that request personal or financial information and claim to be from Allegiance Bank.
24/7 Telephone Banking: 844-334-3814
Debit/ATM Card Support
Business Hours 8:00 AM - 5:00 PM: 281-894-3200
To report your lost or stolen Debit/ATM Card after business hours: 800-500-1044
For Debit Card Transaction Disputes Only:
Monday - Friday 7:00 AM - 3:45 PM: 844-865-5533
To activate a Debit Card: 866-633-5293 or Internationally: 770-248-5774
To return Fraud Service Center phone calls to verify potentially fraudulent transactions: 800-369-4887
Please visit the Post Oak Bank merger page for resources and information about what to expect as we combine operations.
Traveling with your debit card outside of Texas?
Before you leave, please contact your Allegiance Banker at 281-894-3200 during normal business hours to inform us of your destinations and travel dates. This will provide us an opportunity to update your debit card record to ensure you will not be inconvenienced while traveling.
We pledge to provide extraordinary service. We welcome the opportunity to address any of your concerns. We encourage you to contact us by emailing firstname.lastname@example.org.
Find an Office Near You
Allegiance Bank serves the Houston community and surrounding counties through conveniently-located banking offices. To find a location near you, click below.
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