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How to Report or Dispute Activity to GNCU

Reporting Transactions

Whether you want to dispute a transaction that happened in error or a fraudulent purchase on your card, it's important to begin the reporting process as soon as possible. Start by reviewing our various forms below and choose the one that best fits your scenario. Upon completing the form, either drop it off at your local Greater Nevada branch or email it to us at

  • Affidavit of Forgery of Checks - Fraudulent use of checks (stolen, lost, and fake checks using your account information)
  • ACH Dispute Form - To dispute a third party using your account and routing number. This can be used for both fraudulent and non-fraudulent instances.
    • Example of a Fraudulent ACH Dispute: Someone using your account information to make payments without your permission or knowledge.
    • Example of a Non-Fraudulent ACH Dispute: A company you wanted to pay took the wrong amount from your account, or charged more than once.

For all other disputes, or if you have any questions or comments, please feel free to call our fraud hotline at (775) 334-8635, Monday through Friday, 9:00 AM - 6:00 PM.

Alerting GNCU of Lost or Stolen Cards

If your personal debit card or credit card is lost or stolen, please call GNCU immediately at (866) 446-6805 to block and reissue your card. For business cards, please call (877) 203-5815.

If you have lost or stolen checks, please call GNCU at (775) 334-8635, Monday through Friday, 9:00 AM - 6:00 PM, to stop payments and prevent fraud. If you need to stop a payment that is not fraud related, click here to watch our tutorial and learn how.

Suspect Your Information Has Been Compromised?

If you think that any of your account information is compromised, please call GNCU at (775) 334-8635, Monday through Friday, 9:00 AM - 6:00 PM, to place a block on your account.

Are You Taking A Trip? Use GNCU Cards App Travel Notices

You've been working hard and it's finally time for that hard-earned trip out of town. Spare yourself the possibility of having your GNCU Visa debit card frozen due to unexpected activity by taking advantage of the GNCU Cards app's travel notices to notify GNCU when going out of town! If you are unable to use the GNCU Cards app, you can also contact a Member Services Representative at (800) 421-6674 to notify GNCU of your travel plans.