They aren’t guessing. They’re buying leaked information online. The risk of credit card fraud isn’t from physical insecurity (someone stealing it) it’s from online insecurity, mostly from leaks from major retailers or credit card companies. You can’t really do anything to prevent this, but fortunately there’s a huge industry organized to manage this risk and reimburse stolen funds. Answer from ElbieLG on reddit.com
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IdentityTheft.gov
identitytheft.gov
IdentityTheft.gov
Recovering from identity theft is a process. Here’s step-by-step advice that can help you limit the damage, report identity theft, and fix your credit.
IdentityTheft.gov
Recovering from identity theft is a process. Here’s step-by-step advice that can help you limit the damage, report identity theft, and fix your credit.
Account Login
Recovering from identity theft is a process. Here’s step-by-step advice that can help you limit the damage, report identity theft, and fix your credit.
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OCC
occ.gov › topics › consumers-and-communities › consumer-protection › fraud-resources › credit-card-and-debit-card-fraud.html
Credit Card and Debit Card Fraud | OCC
Report the fraudulent charges and request that your card be blocked or replaced. Online: Many financial institutions allow you to report fraud through their online banking or mobile app platforms.
Discussions

How easy is it (really) for thieves to guess a card number
They aren’t guessing. They’re buying leaked information online. The risk of credit card fraud isn’t from physical insecurity (someone stealing it) it’s from online insecurity, mostly from leaks from major retailers or credit card companies. You can’t really do anything to prevent this, but fortunately there’s a huge industry organized to manage this risk and reimburse stolen funds. More on reddit.com
🌐 r/personalfinance
81
67
January 27, 2024
1 Million Stolen Credit Cards Given Away Free On Dark Web
i made a comment to one of my employees about getting a push notification every time i use any of my cards. She looked at me like I was crazy and said "every time??" like yes I know when i spend money and when i get a random one I know to look into it, thankfully it's always some weird time a subscription or whatever pulls. not that difficult to comprehend, at least I didn't think it was... More on reddit.com
🌐 r/CreditCards
39
69
March 2, 2025
How does my credit card keep getting stolen?
After each of these attempts are they cancelling the card and issuing a new card with a new number? More on reddit.com
🌐 r/personalfinance
66
5
June 28, 2024
Numbers keep getting stolen; credit cards without printed or embossed numbers?
The magnetic strip on the card has your name, acct no, expiration date and cvc on it. It also has a few other things like country code and or currency code. It's easy to get a reader that can pull the info. Until the magnetic strips are done away with this will be a problem. Supposedly they stopped putting cvc on the strip, but I have never seen one that was missing. It has been a decade since I worked with cards though. There are still situations where the cvc is not required, so even if its missing, the rest of the info is enough. More on reddit.com
🌐 r/CreditCards
25
21
January 13, 2025
People also ask

What to Do If Your Credit Card Information is Stolen

Federal law can limit the amount of money you’re liable for in the event of identity theft when you use credit cards to make purchases, so long as you respond quickly. Also, some credit card issuers are all too aware of the problem and may voluntarily agree to limit losses and help consumers.

Millions of American consumers have been through this. Stay alert to the possibility that it could happen to you, even after taking every precaution, and plan to take action quickly to limit the losses and regain your identity.

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discover.com
discover.com › card smarts › using your credit card › stolen credit card numbers
Stolen Credit Card Numbers | Discover
What can you do to help protect your credit card information from being stolen?

Be mindful of all the ways thieves can get your credit card numbers and be aware of when you’re vulnerable. Watch your mail, be careful interacting with emails, know what you’re downloading, don’t open your financial accounts on public Wi-Fi networks, look carefully for signs of tampering at gas pumps and other automated credit card readers, and watch the news for data breaches at big companies—they happen more than you might think.

Most credit cards use chip technology, rather than a magnetic strip, as these are designed to be more difficult to hack for in-store purchases where chip readers are enabled. Unfortunately, despite the switch to chips, instances of credit card fraud keep going up every year—while the chips make in-store fraud more difficult, potential identity thieves are always exploring new ways to navigate around protections to access your information. The best advice is to keep your eyes on your credit card statements, credit report, and credit score, so you’ll be aware of any sudden changes that could indicate identity theft.

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discover.com
discover.com › card smarts › using your credit card › stolen credit card numbers
Stolen Credit Card Numbers | Discover
How to Catch Someone Who Stole Your Credit Card

If you run into an issue with stolen credit card numbers, it’s generally pretty difficult to actually track down the perpetrator and even less likely that they’ll be apprehended or face prosecution. The best way to resolve the issue is to take the above steps in reporting the theft of your credit card information to your card issuer and leave the rest to the authorities.

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discover.com
discover.com › card smarts › using your credit card › stolen credit card numbers
Stolen Credit Card Numbers | Discover
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Discover
discover.com › card smarts › using your credit card › stolen credit card numbers
Stolen Credit Card Numbers | Discover
January 15, 2025 - But, if you understand the tools that thieves might use to access your personal data, it could help you keep your information safe. Here’s how people steal credit card numbers and what you can do to protect your card. While protecting yourself online is vital, you should also protect yourself from old-fashioned hazards like financial paperwork.
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Privacy
privacy.com
Privacy.com Virtual Cards – Secure, Temporary Cards
Allows you to mask payment info when shopping online. Especially useful if you don’t trust the website or want to set up a subscription (you can set vendor specific spending limits). Had many instances in the past where I've had to cancel a credit card because of predatory companies, so Privacy.com seemed like the answer. My short time so far using it has already saved me a lot of money and trouble including a stolen card number from my contacts merchant.
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Chase
chase.com › education center › credit cards › credit card basics
How Do Credit Card Numbers Get Stolen? | Chase
November 27, 2024 - Scammers and hackers steal credit card numbers in various ways. Learn the top tactics used to steal credit card information and how to protect yourself and your loved ones.
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Norton LifeLock
lifelock.norton.com › learn › scams & fraud › how do people steal credit card numbers?
How do people steal credit card numbers?
October 30, 2024 - Stolen credit card numbers are often sold on the dark web for as little as $5. These numbers come from data breaches, phishing attacks, or skimmers. Criminals then use these stolen numbers for online purchases.
Find elsewhere
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SpyCloud
spycloud.com › home › why cardholder data on threads is a growing risk for fraud & security teams
Credit Card Data on Threads: Risk Insights for Fraud Team
June 26, 2025 - In what may be correlated to the increased scrutiny of Telegram following Pavel Durov’s arrest, SpyCloud security researchers have observed and documented several instances of newly created Meta Threads accounts posting full stolen credit card numbers and other sensitive personally identifiable information (PII).
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Reddit
reddit.com › r/personalfinance › how easy is it (really) for thieves to guess a card number
r/personalfinance on Reddit: How easy is it (really) for thieves to guess a card number
January 27, 2024 -

My wife and I never use our debit cards. We always keep them locked via the bank app and stored away at home. We never have visitors at home.

Yet

Someone attempted to use her card for audible purchases. The bank actually let the first transaction through, even though we had the card locked, because the merchant tagged it as a recurring payment. The thief then attempted a larger transaction which my bank declined.

We’re actually annoyed the bank allowed the first transaction. We never use our debit card, and only (rarely) get cash from an atm, and always the bank’s atm at a branch.

My ultimate question is, though, how easy is it,l for thieves to guess card numbers. Because, if any merchant can tag any transaction as “recurring”, then this is problematic for cash account safety. Especially if the card lock feature can be bypassed

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Texas Attorney General
texasattorneygeneral.gov › consumer-protection › financial-and-insurance-scams › credit-and-debit-card-theft-and-protection
Credit and Debit Card Theft and Protection | Office of the Attorney General
Draw a line through any blank lines on the receipt (e.g., "Tip Amount"). Never give your card number over the phone unless you made the call. Never reply to mail or email with your credit card number. If paying online, check the top area of your web browser for "https://"—which means the ...
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USAGov
usa.gov › home › scams and fraud › identity theft
Identity theft | USAGov
There are several ways that scammers can steal your identity, including in person, online, through social media, and by phone. Scammers may: Steal your wallet or purse to get ID, credit, or bank cards
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Wcucu
wcucu.com › about us › blog
4 Ways Your Credit Card Information Gets Stolen - WCU Credit Union
They can record your keystrokes, track your online activities, slow down your device, and some can even take over your computer. If they monitor your online activity and keystrokes, it’s only a matter of time before they get all of your personal information, including your credit card information.
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IronVest
ironvest.com › blog › how-people-steal-credit-card-numbers
How people steal credit card numbers: 8 methods – IronVest
Carding: Illegal online marketplaces sell credit card info. Physical theft: Someone steals the details off your physical card. Mail theft: Criminals steal credit card statements, new cards, or other relevant information directly from your mailbox. Data breaches: Large-scale data breaches can expose user credit card and debit card numbers.
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Experian
experian.com › home › fraud & identity theft › 5 steps to take if someone opens a credit card in your name
5 Steps to Take if Someone Opens a Credit Card in Your Name
January 23, 2025 - The FTC also runs ReportFraud.ftc.gov, which you can use to report fraud and scams. Although your identity theft led to a type of credit card fraud, the IdentityTheft.gov website is a better fit if someone opens a credit card in your name.
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Consumer Advice
consumer.ftc.gov › node › 78373
Lost or Stolen Credit, ATM, and Debit Cards
3 weeks ago - Call — or get on the mobile app — and report the loss or theft to the bank or credit union that issued the card as soon as possible. Federal law says you’re not responsible to pay for charges or withdrawals made without your permission ...
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Forbes Advisor
forbes.com › advisor › credit-cards › what-happens-to-stolen-credit-card-numbers
What Happens to Stolen Credit Card Numbers – Forbes Advisor
November 6, 2025 - The data may enter a period where ... be anywhere from minutes to days to years. A buyer uses the stolen data to make purchases either online or in physical stores using a fake card....
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Enzoic
enzoic.com › blog › credit card fraud: how does it work?
Credit Card Fraud: How Does It Work? | Enzoic
March 6, 2025 - Card Checkers: Automated tools that test stolen credit card numbers against legitimate payment processors like Stripe and Braintree
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Reddit
reddit.com › r/creditcards › 1 million stolen credit cards given away free on dark web
r/CreditCards on Reddit: 1 Million Stolen Credit Cards Given Away Free On Dark Web
March 2, 2025 -

Good reminder to keep on top of your accounts and to be cautious online —

A Feb. 21 report by Andrea Draghetti, the head of threat intelligence at D3Lab, revealed that a well-known illegal marketplace and carding site called B1ack Stash has dropped a free giveaway of more than a million stolen credit cards to its users. The “massive collection of sensitive data containing over 1 million unique credit and debit cards,” was published to the criminal forum on Feb. 19 and contained six archives comprising a total of 1,018,014 cards.

It is understood that the data included such highly sensitive information as the primary account number of the credit cards concerned, along with expiration dates and the card verification value, CVV2, security code. But that’s not all; there are also cardholder details such as their full name, address, date of birth and telephone number as well as email address. Pretty much everything you would need to commit credit card fraud or launch phishing attacks against the cardholder.

Full article is available here. The original D3Lab announcement is available here.

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Anura
anura.io › blog › how-fraudsters-are-using-test-credit-card-numbers-and-what-to-do-about-it
Protect Yourself from Credit Card Testing Fraud | Anura
October 29, 2025 - TL;DR: Fraudsters are increasingly using stolen credit card numbers for small “test” purchases to verify their validity before launching larger fraud. These low-dollar transactions can cost e-commerce businesses thousands through chargebacks, ...
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Visa
usa.visa.com › support › consumer › lost-stolen-card.html
Reporting Stolen and Lost Credit Cards | Visa
Visa's Zero Liability Policy* is our guarantee that you won't be held responsible for unauthorized charges made with your account or account information. You're protected if your Visa credit or debit card is lost, stolen or fraudulently used — ...