Contact Us

Our roots are right here in this area. As a community Credit Union, many of us were born and raised in the communities that we serve. Because of that, we make our decisions right here at the Credit Union. Some places have local branches. We have local roots. We are a better way to bank. Call, click or stop by to visit us.

For security purposes, you must call us to reset your online banking username, password or security questions.

Send Us An Email

Note that email communication is not encrypted. Do not send confidential information or instructions to us via email.

service@sentinelfcu.org

Give Us A Call

CALL CENTER
Mon – Fri 8:00am – 5:00pm MT
Main Phone: 605-923-1405
Toll-Free: 888-923-1400
Overseas DSN: 675-6303
Fax: 605-923-3960

Routing Number: 291479291

Let us know if you’ll be traveling with your card

If you will be traveling outside of your normal area of debit or credit card use, please let us know so your cards won’t be blocked or flagged for unusual activity. Give us a call at least 48 hours in advance at 605-923-1405 or toll-free at 888-923-1400 to let us know the dates and locations you will be traveling and to verify we have correct phone numbers to reach you. Have a safe trip!

Report Lost or Stolen Card

Mon – Fri 8:00am – 5:00pm MT
605-923-1405 or 888-923-1400

After Business Hours
Due to our transition towards chip enabled-cards, the new phone number to report lost or stolen Sentinel cards is listed below. Retain this number for your records and please update the phone number listed on the back of your existing Sentinel cards.

Sentinel FCU Cards:
800-682-6075
ReportMyCards.com

Rapid City Telco FCU Cards:
Debit Cards: 800-236-2442
Credit Cards: 800-808-7230

Card Transaction Assistance

Mon – Fri 8:00am – 5:00pm MT
605-923-1405 or 888-923-1400

After Hours Assistance
Sentinel FCU Cards:
888-526-0404

Rapid City Telco FCU Cards:
Debit Cards: 800-236-2442
Credit Cards: 800-808-7230

Activate Your Sentinel FCU Card

800-411-6390
ActivateMyCards.com

Change Your PIN

If you know your current PIN, you can visit any Sentinel ATM to immediately get a new PIN for your Sentinel ATM, Debit and chip-enabled Credit Cards.

If you forgot your PIN or would like a new PIN, you can call 877-746-6746, anytime, to change the PIN for any of your Sentinel cards. Your new PIN will be available within two business days.

Mailing Address

Sentinel Federal Credit Union
PO Box 700
Box Elder, SD 57719

Locations & Hours