We welcome your comments and questions, so please feel free to contact us.
- Forgot your online banking password?
- Need to reactivate your online banking account?
- Need to order checks?
- Send us a message
Phone Numbers:
Main Phone: 605-923-1405
Toll-Free: 888-923-1400
Main Fax: 605-923-3960
Overseas DSN: 675-6303
To Report Lost or Stolen Cards:
If your Sentinel Federal card is lost or you believe it has been stolen, call us immediately at the appropriate number below.
During Normal Business Hours: Mon – Fri 8:00 am – 5:00 pm (MT)
Phone: 605-923-1405 / 888-923-1400
After Business Hours:
ATM Cards: 800-472-3272
Debit Cards: 800-682-6075
Credit Cards: 800-543-5073
Mailing Address:
Sentinel Federal Credit Union
PO Box 700
Box Elder, SD 57719
Routing Number: 291479291
