What to do after you spot credit card fraud on your account
An unfamiliar charge deserves prompt attention. If you believe someone used your credit card or card number without permission, start with the account itself and work outward. The goal is to stop further use and create a clear record of what happened.
Start with your card issuer
Use a trusted channel to contact the issuer. Call the number on the back of the card or open your bank's official app or website. Federal consumer guidance recommends reporting fraudulent charges promptly and asking whether the issuer needs to block the card or send a replacement.
Tell the issuer which transaction you do not recognize. Ask how to dispute the charge and whether the card number, password, or other account credentials need to change.
Do not use a phone number or link from an unexpected text or email that claims to warn you about fraud. Open the banking app yourself or use contact information you already know is legitimate.
Write down what happened
A record can save time when a bank, credit bureau, law-enforcement agency, or government office asks for details. Keep everything in one secure place so you can find reference numbers and supporting information.
Record the facts that may help you explain the incident:
- the date, amount, and merchant name shown for the charge;
- when you first noticed it and contacted the issuer;
- confirmation numbers from disputes or reports;
- screenshots, emails, texts, or account alerts tied to the incident.
Keep these records after the first call. A dispute can involve follow-up questions, and having the same details in front of you makes those conversations easier.
Do not send passwords, one-time security codes, full card numbers, or Social Security numbers through an unverified message or form. A second contact that mentions the original fraud can still be another scam.
Check whether the problem reaches beyond one card
A stolen card number may be used for purchases without giving someone control of your full identity. Account takeover goes further: a criminal gains access to an existing account and may change login details or contact information.
Check your other financial accounts for activity you do not recognize. Unexpected password resets, unfamiliar accounts, changed contact details, or signs that someone opened new credit in your name can point to broader identity theft.
If the signs extend beyond one transaction, IdentityTheft.gov can help you report identity theft and build a recovery plan. Depending on what happened, a fraud alert or credit freeze may also be appropriate.
Report fraud through the right channels
The card issuer handles the transaction dispute, so that contact comes first for an unauthorized credit card charge. Keep the issuer's confirmation number and follow its instructions for any documents it asks you to provide.
Other reports depend on the circumstances. Identity theft may call for an FTC report, while some incidents may also justify a report to local law enforcement. One report does not automatically notify every bank, creditor, credit bureau, or government office involved.
Watch for follow-up scams
Fraud can lead to another round of calls, texts, or emails. Someone may claim to represent a bank, credit bureau, government office, or security team and ask you to verify information immediately.
End unexpected contact and verify the request independently. Use an official app, a known website, a recent statement, or a phone number printed on your card. Never share a password or one-time security code with an unsolicited caller or texter.
Continue monitoring your accounts after the first dispute. Another unfamiliar charge or login alert may show that other credentials still need attention.
How our office fits into public safety
The Black Hawk County Attorney's Office shares information that can help residents recognize warning signs and reduce future risk. Our existing credit fraud guidance covers common ways financial information can be misused and practical prevention steps.
Banks handle transaction disputes and reimbursement decisions. Our office does not resolve cardholder claims or guarantee a particular outcome with a financial institution.
After spotting credit card fraud, work through the problem in a clear order: secure the account, document the incident, check for wider identity misuse, and use verified reporting channels. That gives you a usable record and directs each part of the problem to the organization responsible for handling it.