Contact Us

Website Accessibility

At Sunflower Bank, we are committed to providing a website that is accessible to all of our site visitors. If you have any difficulty accessing any of the information on, or have any suggestions for accessibility improvements we could make, please call 888.827.5564 or email [email protected].

Notice of Third-Party MOVEit Data Breach

A cybersecurity vulnerability with third-party software provider, MOVEit, has impacted thousands of companies, including Sunflower Bank. Visit this page for more information.

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Customer Care Center

Available 8AM-8PM (CT) Monday-Friday and 8AM-4PM (CT) Saturday

Call: 888.827.5564  |  [email protected]

Assistance with:  Personal Online Banking, Business Banking Direct, Account-related questions, etc.

Treasury Management Direct Client Support

Call: 833.377.8265  |  [email protected]

CheckIt – Automated Phone Banking

Call: 800.552.2432

Credit Card & Debit Card Travel Notification

Traveling? Purchases not typical with your spending patterns may trigger fraud alerts for your protection. Call us in advance of any atypical travel or unusual purchase plans. If you are traveling internationally, beyond Canada and Mexico, you must notify us in advance if you intend to use your debit card.

Call: 888.827.5564

Report a Lost or Stolen Debit Card

Call: 800.472.3272

Mortgage Servicing

Request for Information or Notice of Errors must be sent to:

Customer Service
P.O. Box 833890
Richardson, TX 75083-3890

Call: 800.331.4799  |  [email protected]

Guardian Mortgage, a division of Sunflower Bank, N.A.

Sunflower Bank Headquarters

8117 Preston Rd #220 | Dallas, TX 75225

Provide Feedback

Whether a compliment, complaint or suggestion – we’d love to hear from you. Please take a moment to help us enhance our service levels, elevate our product offerings or give us a pat on the back if you love your bank.

Please provide us with your feedback below and we will respond as appropriate. We appreciate it!

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