CONTACT US
Sunflower Bank Headquarters
1400 16th St, Ste 250
Denver, CO 80202
Customer Care Center - Please note, we are currently experiencing high call volume adding to wait times
Available 8 AM-8PM (CT) Monday-Friday and 8AM-4PM (CT) Saturday
Call: 888.827.5564
Email us
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:
Guardian Mortgage, a division of Sunflower Bank, N.A.
Customer Service
P.O. Box 833890
Richardson, TX 75083-3890
(800) 331.4799
customerservice@gmc-inc.com
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.
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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 SunflowerBank.com, or have any suggestions for accessibility improvements we could make, please call 888.827.5564 or email CustomerService@SunflowerBank.com.