New Phone Numbers for Your Cards

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Our debit card and credit card processing system will be upgraded on Mon., Feb. 8, 2021, beginning at 3 a.m. MT and ending at 8 a.m. MT.

After the upgrade, please use the new phone numbers below to manage and protect your Sentinel debit card and credit card.

  • Report Lost or Stolen Card or Fraud – After Business Hours: 888-297-3416
  • Get Assistance with Your Cards – After Business Hours: 800-547-3556
  • Activate Your Card: 800-290-7893
  • Change Your PIN: If you forgot your PIN or would like a new PIN, you can give us a call at 605-923-1405 or 888-923-1400 during normal business hours.
  • Extra Awards Redemption Center and Support: 855-854-5493
Also, remember you can manage your cards from our Mobile App using the “Manage My Cards” feature which allows you to lock and unlock your cards at any time, for any reason. Download our app from the App Store and on Google Play.

Other News & Updates

Check out other recent Credit Union and Financial News & Updates.

What Our Members Say About Us

Bret R

Member

“I have been using Sentinel for almost 30 years, and my family has been just as long! I purposely make the extra drive to the Radar Hill Branch with Nate working there! Not only has he always been on the ball of my personal account, but my business account! He has resolved issues with other banks in a timely manner when he didn’t have to! Every time I go on he always has a smiling face and is easy to work with.”

Chris P

Member

“If you’re in the Rapid City area and you’re looking to drop the elbow off the top rope, Macho Man style, then look to Sentinel Federal Credit Union! Their customer service is off the hook and when you call you never get a robot or an automated answering machine! I don’t think I’ll trust another big bank with my money for as long as I live! By the way, I don’t even live in South Dakota!”

Joe M

Member

“We have several credit unions that got lost in the mix during a move–our bad. However, out of all of those credit unions, SFCU went OUT OF THEIR WAY to ensure we knew our account was dormant and helped us through the process of getting the account back on track. They also refunded every fee taken for dormant status. After losing more money than I’d like to admit from other institutions, I cannot tell you how much I appreciate the customer service of Sentinel FCU.”

Joshua K.

Member

“Been a loyal member for years! Keep your account positive and make your payments. If life happens keep them updated, as they have ways of working with you. I am glad they are a part of my financial family.”