Credit card fraud takes many forms — stolen card numbers, phishing scams, compromised merchant databases, and account takeover are just a few examples. The threat is real, but understanding common fraud methods and adopting practical security habits can help reduce your risk.
Understanding how credit card fraud works can help you recognize warning signs and take steps to protect yourself.
How Fraudsters Get Your Card Data
Data Breaches
Data breaches are one way payment card information can be compromised. Depending on the breach, compromised information may include payment card numbers, expiration dates or other account and personal information. Stolen information may later be misused or sold through illicit marketplaces.
You don't have to do anything wrong to be a victim of a data breach. Your card data can be stolen from a company you haven't interacted with in years.
Physical Skimmers
Skimming devices are small electronic tools attached to ATMs, gas pump card readers, and point-of-sale terminals. When you swipe your card, the skimmer captures your card's magnetic stripe data. Some include a tiny camera to capture your PIN.
Modern chip cards (EMV) have helped reduce counterfeit card fraud. EMV chip technology generates a unique security code for each transaction instead of transmitting static magnetic stripe data, which makes it harder to create counterfeit cards. However, EMV does not eliminate all fraud — stolen card information can still be used for online purchases where the physical card is not required. If a terminal forces a magnetic stripe swipe (some still do), you remain more vulnerable to skimming.
Phishing, Smishing and Vishing
Phishing attacks impersonate legitimate institutions — your bank, the IRS, a retailer — via email, text (smishing), or phone (vishing). The goal is to trick you into providing your card number, login credentials, or personal information.
Phishing attacks have become increasingly sophisticated. AI tools can help scammers create more polished messages, reducing the spelling errors and awkward phrasing that were once reliable warning signs. However, unexpected urgency, requests for sensitive information, and mismatched sender addresses remain strong indicators of a scam.
Wi-Fi Interception
Most modern websites use HTTPS encryption, so information transmitted between your browser and an HTTPS website is encrypted even when using public Wi-Fi. However, HTTPS does not prove that a website itself is legitimate — scam websites can also use HTTPS. When accessing financial accounts, confirm you are on the legitimate website or official app, keep your devices and browsers updated, and use strong account security such as multi-factor authentication where available. Public Wi-Fi is not inherently dangerous for HTTPS-encrypted activity, but caution remains appropriate when using unfamiliar public networks.
Card-Not-Present Fraud
Once a fraudster has your card number, expiration date, and CVV, they can make online purchases without the physical card. This "card-not-present" fraud can occur when stolen payment credentials are used for transactions where the physical card is not presented.
What Fraudsters Do With Stolen Data
Stolen payment information may be traded or sold through illicit marketplaces. Fraudsters may:
- •Make small test purchases first to verify the card is active
- •Move quickly to larger purchases before the card is flagged
- •Buy easily resellable goods (gift cards, electronics) or digital products
- •Sell goods for cash or cryptocurrency
Fraudulent activity may appear quickly or months after payment information is compromised, so continued account monitoring is important.
How Banks Detect Fraud
Financial institutions may use automated systems and multiple transaction signals to identify potential fraud. These systems may analyze factors such as:
- •Velocity — Is this person making many purchases in a short time?
- •Location — Is a purchase happening far from the cardholder's usual area?
- •Behavioral baseline — Is this purchase consistent with this cardholder's typical spending?
- •Merchant category — Has this cardholder ever shopped at this type of merchant?
- •Device fingerprinting — Is this the usual device and browser this person uses?
When a transaction looks anomalous, the bank may decline it automatically, send a verification text, or flag it for review. These systems are sophisticated but imperfect — legitimate transactions are sometimes declined, and fraudulent ones sometimes slip through.
Practical Steps to Protect Yourself
Enable real-time transaction alerts
Many card issuers offer transaction alerts or account notifications. Check your issuer's app or account settings to see which alerts are available. Enabling alerts can help you spot unauthorized charges sooner.
Use virtual card numbers for online shopping
Some card issuers and third-party services offer virtual card numbers for online shopping. Virtual card numbers can help protect your actual card number when shopping online. Features vary by provider — not every virtual card is single-use or limited to a specific amount, and some providers generate a new number for each transaction while others create a reusable number tied to a specific merchant. Check with your issuer to see what options are available.
Freeze your credit
If you're not actively applying for credit, consider freezing your credit reports at all three bureaus (Equifax, Experian, TransUnion). A credit freeze restricts prospective creditors' access to your credit file, which can help prevent identity thieves from opening new credit accounts in your name. A credit freeze does NOT prevent fraudulent transactions on an existing credit card account. Freezes are free and can be temporarily lifted when needed.
Review statements monthly
Don't wait for your bank to catch fraud. Review your statements monthly and look for unfamiliar transactions — especially small ones, which fraudsters use as tests.
Use chip and tap over swipe
Always use your card's chip or contactless tap when available. When chip or contactless payment is available, prefer it over magnetic-stripe swipe transactions because EMV technology provides additional protections against counterfeit card fraud.
Be skeptical of unsolicited contact
Never provide passwords, PINs or verification codes in response to unsolicited calls, texts or emails. If you are unsure whether a message is legitimate, contact your financial institution directly using a trusted number, such as the number on the back of your card or in the official app.
What to Do If You Discover Unauthorized Charges
- 1Contact your card issuer immediately — Call the number on the back of your card or use your issuer's official app. Most issuers have 24/7 fraud lines. Under federal law (the Truth in Lending Act and Regulation Z), your liability for unauthorized use of a lost or stolen credit card is generally limited to no more than $50. If only your account number was stolen — not the physical card — and the account is used without your authorization, you generally have no liability for those charges. Many card agreements provide additional protections beyond what the law requires, including zero-liability policies.
- 2Document everything — Note the date you noticed the fraud, the specific transactions, and who you spoke with at the issuer. Keep records of any case or reference numbers.
- 3Ask whether the card or account number should be replaced — If your card information has been compromised, ask the issuer whether a new card with a new number should be issued. This can help prevent further unauthorized charges on the compromised account.
- 4Follow up in writing to preserve billing-dispute rights — Reporting suspected unauthorized charges to your issuer immediately is the most important first step, and many issuers resolve fraud claims through a phone call or app notification. Separately, to preserve your full billing-error dispute rights under the Fair Credit Billing Act (FCBA) and Regulation Z, you may need to send a written billing-error notice to the creditor. The FCBA generally requires that the creditor receive your written notice no later than 60 days after the creditor transmitted the first periodic statement showing the unauthorized charge. Send the notice to the specific address the creditor designates for billing inquiries (typically listed on your statement), not to the payment address. Some issuers may also accept electronic disputes — check your card agreement or statement for details. Missing the 60-day billing-error notice deadline does not automatically make you liable for unauthorized credit card charges — federal law limits your liability for unauthorized use regardless of whether you meet the FCBA's billing-error notice deadline. However, sending timely written notice helps preserve your right to have the dispute formally investigated and corrected under the FCBA's billing-error resolution process.
- 5Check your other accounts — If one account is compromised, review others. Fraudsters may have more of your data than just one card number, so check statements for any accounts that could be affected.
- 6Consider a fraud alert or credit freeze if you suspect identity theft — If you suspect that more than one card number may have been compromised or that someone has your personal information, consider placing a fraud alert or credit freeze. A fraud alert instructs lenders to take extra steps to verify your identity before opening new accounts in your name — contact one of the three nationwide credit bureaus (Equifax, Experian, or TransUnion) and that bureau must notify the other two. A credit freeze restricts access to your credit report, making it harder for identity thieves to open new accounts. Neither a fraud alert nor a credit freeze prevents unauthorized transactions on an existing credit card account — they only address new-account fraud. If you suspect identity theft rather than isolated card fraud, report it at IdentityTheft.gov.
What Happens After You Report Fraud
After you report unauthorized charges, your card issuer typically opens an investigation. The issuer may issue a provisional credit while it reviews the dispute, and it may request additional information from you. For card-not-present transactions, the issuer may initiate a chargeback process with the merchant's bank, which can result in the disputed amount being reversed. The timeline and outcome vary depending on the issuer, the transaction type, and the specifics of the case. Not every dispute results in a chargeback or reversal, and the process can take several weeks. Reporting promptly and providing any requested documentation can help, but the issuer's decision is based on its investigation of the facts.