How to protect your credit card: 4 steps to avoid fraud when shopping online

Have you ever shopped online and only remembered your card number and expiration date, but often forgot the CVV code on the back of the card? Many people also wonder: can you make payments without a CVV and is it okay to bypass this code? In reality, the CVV is a crucial "shield" that helps secure credit cards, prevent fraud, and protect your money.

In this article, you will understand the role of the CVV code, the common scams used by criminals to steal card information, and most importantly, how to secure your credit card safely when paying online. The content is concise, easy to understand, and focuses on practical solutions to help you shop with peace of mind every day.

How to secure your credit card: What you need to know about the CVV code

Do not try to bypass the CVV code when making a payment

• Intentionally bypassing the CVV code when requested by a merchant is illegal and carries high risks.

• If a website allows payment without a CVV, it is highly likely that its system is not secure enough and prone to fraud.

• This is why the CVV is considered a crucial layer of protection in credit card security when shopping online.

How do criminals often steal CVV codes?

• Phishing scams: Sending fake emails, messages, or websites impersonating banks, asking you to enter your card information.

• Keylogger software: Recording keystrokes when you enter your card number and CVV code on an infected device.

• These methods are becoming increasingly sophisticated, targeting unsuspecting users who make online payments.

How to secure your credit card and CVV code more safely

• Only enter the CVV code on reputable websites with https and a padlock icon.

• Absolutely do not provide card information via email, messages, or phone calls from unknown sources.

• Regularly check your card statements to detect suspicious transactions and report them to the bank promptly.

• These habits significantly reduce the risk of losing money due to credit card fraud.

What to do if you can't find your CVV code

• If you need your CVV code but don't have your physical card with you, call your card-issuing bank directly.

• After verifying your identity, the bank may help you retrieve or reissue the necessary information.

• Avoid searching for your CVV code through third parties to ensure maximum credit card security.

Part 1: Can you bypass the CVV code when making a payment?

Meaning 1: You cannot and should not bypass the CVV code when making a card payment

Bypassing the CVV code is illegal and impossible

• When a merchant requests a CVV code, the payment system must have this code to process the transaction.

• Attempting to bypass the CVV not only violates payment regulations, but in reality, it is also impossible to do.

The CVV code helps verify that you are the legitimate cardholder

• The CVV is an important security layer in credit card security, especially for:

  • Online payments

  • Phone payments

• These transactions are called card-not-present transactions, so the CVV plays a role in confirming that you are directly using the card.

What happens if you don't enter the CVV?

• If you do not provide the CVV when requested:

  • The transaction will be rejected immediately.

  • You have only two options:

    • Enter the correct CVV code to proceed with payment.

    • Switch to a non-card payment method, such as bank transfer or money transfer application.

Important conclusion for users to know

• There is no legal way for you to pay with your credit card without providing the CVV code.

• Therefore, instead of trying to bypass it, you should focus on securing your CVV code, only using it on reputable websites, and regularly checking transactions to avoid fraud risks.

Meaning 2: Is it safe to pay without a CVV?

Websites not requiring a CVV code are a high-risk indicator

• When making a payment without being asked for a CVV, that transaction is not fully secure.

• CVV codes have been widely used since the 1990s, so websites that do not require a CVV usually fall into one of two categories:

  • The system is too outdated and lacks security standards.

  • Phishing websites designed to steal your card information.

• With such websites, even if criminals only have your card number and expiration date, they can still make purchases even if they don't know the CVV.

How criminals can exploit the lack of CVV

• If your card information has been partially compromised:

  • Card number

  • Expiration date

• Criminals can make unauthorized purchases on websites that do not require a CVV, effectively rendering credit card security useless.

Recurring payments do not require re-entering the CVV

• For recurring payment services (subscriptions):

  • Providers usually only require the CVV on the first payment.

  • Subsequent payments are considered authorized by you, so re-entry is not needed.

• This is a legitimate process and completely different from websites that bypass the CVV from the start.

Warning about software promising purchases without a CVV

• Tools that advertise the ability to pay online without a CVV are almost always:

  • Malware

  • Schemes to steal card data and personal information

• Installing or using such software can lead to you losing control of your credit card.

Practical advice for credit card security

• Always prioritize websites that require complete security information, including CVV.

• Avoid shopping on platforms that show signs of being old or unverified.

• Do not trust any solution that promises to bypass the CVV code.

Part 2: What is a CVV code? Its meaning on credit cards

Meaning 1: The CVV code helps increase security for card-not-present transactions

CVV is a security layer against fraud in online payments

• The CVV (Card Verification Value) code is used for card-not-present transactions such as online shopping or phone payments.

• Its main purpose is to confirm that the payer is holding the physical card in their hand, not just knowing the card information from paper or online.

• This is a core element in current credit card security.

Why was the CVV code created?

• The CVV was introduced by card organizations from the late 1990s, when credit card information theft began to increase sharply.

• Adding the CVV code significantly reduced fraudulent transactions, especially those without a physical card.

All current credit card types have a CVV code

• All valid credit cards are issued with a CVV code, including:

  • Physical credit cards

  • Virtual credit cards

• This shows that the CVV has become a mandatory security standard, not an optional feature.

Points users need to remember

• The CVV is not supplementary information, but a crucial authentication factor when making payments.

• Understanding the correct role of the CVV will help you use your card more safely and avoid financial losses due to fraud.

Meaning 2: The CVV code is usually a 3-digit number on the back of the card

• Most credit cards have a 3-digit CVV code, printed on the signature strip on the back of the card.

• This is a common location banks use for easy user recognition during online payments.

Some card organizations display CVV differently

• American Express uses a 4-digit CVV code, not the usual 3 digits.

• This code is printed on the front of the card, usually above or near the card number.

• This difference does not affect functionality; it is simply a specific standard of each card organization for credit card security.

The name of the CVV code may vary depending on the bank and card type

• Although they have the same function, CVV codes can be called by different names:

  • Discover: Card Identification Number (CID)

  • Mastercard: Card Validation Code (CVC2)

  • Visa: Card Verification Value 2 (CVV2)

  • Most debit cards: Card Security Code (CSC)

What users need to remember

• Despite different names or number of digits, all these codes have the same purpose:

  • Verify cardholder during payment

  • Enhance credit card security in online transactions

• Therefore, you need to protect your CVV code carefully and not share it with anyone in any form.

Meaning 3: CVV is not a PIN

CVV and PIN have completely different functions

• PIN (Personal Identification Number) is a 4-digit code set by the user, used for:

  • Withdrawing cash with a credit card

  • Withdrawing cash and direct payment with a debit card

• PIN is a layer of cardholder authentication when transacting directly at ATMs or POS machines.

How to create and manage PINs

• When you receive the card, the bank may provide a temporary PIN.

• Users usually have to change to a personal PIN to increase security.

• The PIN can be changed at any time according to the cardholder's needs.

CVV works differently

• CVV is a code generated by the bank or card issuer.

• Users cannot change the CVV code themselves.

• CVV is primarily used for online or phone payments, i.e., transactions that do not require a physical card.

Key points to remember for credit card security

• Do not enter your PIN when shopping online unless specifically requested by the bank for a special transaction.

• Do not share your CVV in any form.

• Clearly distinguishing between CVV and PIN helps you avoid fraud and use your card more securely.

Part 3: Is it necessary to enter the CVV code for every transaction?

You don't need a CVV code for all transactions

• The CVV code is only necessary when paying online or by phone.

• CVV is linked to the card's security chip, so it doesn't always have to be entered manually.

Transactions where the card is presented do not require CVV

• For transactions where you swipe, insert, or tap your card directly at a store:

  • The system has already authenticated the information via the magnetic stripe or chip on the card

  • You do not need to enter a separate CVV code

• This is called a card-present transaction and has a higher level of security.

When is a CVV code mandatory?

• CVV is a mandatory requirement for card-not-present transactions, including:

  • Online shopping

  • Ordering by phone

• In these cases, CVV acts as verification that you are holding a real card, helping to increase credit card security.

Some in-person transactions may require a PIN

• Some cards, especially debit cards, may require entering a PIN for in-person payments.

• PIN is a code you set yourself, completely different from CVV:

  • PIN is used for in-person transactions

  • CVV is used for online transactions

Important points to remember

• No CVV needed when paying at a store

• CVV always needed when shopping online

• Distinguishing clearly between CVV and PIN helps you use your card correctly and more securely

Part 4: How criminals steal your CVV code you need to know

Step 1: Criminals can steal CVV codes through phishing scams

What is phishing and why is it dangerous?

• Phishing is a form of scam through fake emails or messages, disguised as notifications from banks, financial companies, or familiar services.

• The goal of criminals is to trick you into voluntarily providing personal information, including:

  • Credit card number

  • CVV code

  • Account password

  • Other identification information

• This is one of the biggest risks to watch out for in credit card security.

How to recognize and avoid phishing traps effectively

• Do not enter personal information from links in emails or messages

  • Instead, manually type the official website address of the business into your browser

  • Or contact them directly through official support channels

• Do not call phone numbers that appear in suspicious emails

  • These are often fake numbers set up by criminals to exploit more information

• Check for unusual signs in the email content

  • Spelling errors, careless phrasing

  • Logo or colors that don't match the real brand

  • Strange email addresses, for example:

    • A company uses a ".com" website but the email is from ".org" or another unusual domain

Principles to remember for CVV security

• Banks never ask you to provide your CVV via email or message.

• Only enter card information on reputable websites with the correct domain.

• Be highly cautious of messages that create a sense of urgency, threats, or unusual promises.

Step 2: Criminals can steal card information using keylogging techniques

What is keylogging and why is it easy to lose money?

• Keylogging is a form of keystroke monitoring using tracking code or malicious software.

• When you enter information on an insecure website, criminals can record your card number, CVV code, and other sensitive data, then use it to carry out fraudulent transactions.

• Keylogging usually occurs in two ways:

  • Insecure websites are compromised and tracking code is installed

  • Users click on junk links, spam links, accidentally installing malware on their device

Signs and situations prone to keylogging

• Paying on a website of unknown origin

• Clicking on ads, emails or messages containing strange links

• Device has no or outdated security software

How to prevent keylogging to secure credit card

• Only enter card information on secure websites

  • Address starts with "https"

  • Has a padlock icon on the browser's address bar

• Install and update reputable antivirus software

  • Applies to computers, phones, and all devices used for online payments

  • Always enable automatic updates to patch security vulnerabilities

Principles to remember

• Insecure website = risk of CVV and card number exposure

• Unprotected device = vulnerable to activity tracking

• Proactive prevention is the most effective way to secure credit card

Part 5: How to get CVV code when you don't have the card with you

Contact the card issuing bank directly

• If you can't find your physical card but need the CVV code, the only safe and legitimate way is to call the card issuing bank.

• Avoid looking up CVV through websites or third parties as it can easily lead to information disclosure and fraud.

Prepare information to verify identity

• Customer service staff will ask you to confirm to ensure you are the cardholder, usually including:

  • Credit card number or account number

  • Registered phone number or billing address

  • Personal information such as date of birth or other authentication data

• This is a mandatory step to secure the credit card and prevent unauthorized access.

Receive support from the bank

• After successful verification, the bank staff may:

  • Look up card information

  • Guide you on how to retrieve or re-issue the CVV code according to security regulations

• Each bank has its own process, but all prioritize the security of the cardholder's information.

Important note

• Banks do not provide CVV via unverified email or message.

• If there is an unusual request outside the above process, stop and re-check to avoid fraud.

Part 6: Tips to keep your CVV safe when paying online

Tip 1: Only shop online on secure websites

Check website address before entering CVV code

• Before entering card information, especially the CVV code, carefully look at the URL in the browser bar.

• A secure website must have:

  • Address starting with “https”, not “http”

  • Padlock icon on the address bar

• This indicates that the data is encrypted with SSL technology, helping to prevent card information from being eavesdropped by third parties.

Websites without https pose high risks

• A website that does not display https and a padlock is not 100% fraud, but:

  • More vulnerable to hacker attacks

  • Higher risk of malware or information theft

• When making payments on these sites, credit card security is almost ineffective.

Legitimate websites are not allowed to store CVV codes

• According to card security standards, reputable websites are not allowed to store customers' CVV codes.

• If a website requests:

  • Store CVV for later payments

  • Send CVV via email or message
    → This is a very dangerous sign, you should stop the transaction immediately.

Important principles to remember

• Only enter CVV on websites with https and a padlock

• Avoid paying on platforms without security standards

• Don't trust any site that asks to save or share your CVV code

Tip 2: Ignore all requests for credit card information

Unexpected requests are often a sign of fraud

• If you receive random emails, messages, or calls asking for:

  • Credit card number

  • CVV code

• Ask yourself: why do they need this information?

  • If you did not initiate the contact, it is highly likely a scam

• Banks and payment providers do not request CVV through these channels.

Do not share credit card images in any form

• Avoid sending card photos via messages, social networks, even if:

  • Sending to friends

  • Sending to relatives to buy on your behalf

• If the photo is leaked or stored insecurely, criminals can:

  • Get card number

  • Get CVV code

  • Perform fraudulent transactions on your account

Golden rule for credit card security

• You are the one initiating the transaction → then consider providing card information

• Do not share CVV via email, phone, or message

• Do not send card photos, even to acquaintances

Tip 3: Protect internet connection to keep card information safe

Use security software and secure WiFi

• When transacting online, the security of your internet connection is as important as the website you visit.

• Make sure your home WiFi has a strong password, avoid using default passwords to limit the risk of intrusion.

Use VPN when accessing external networks

• When using public WiFi or unfamiliar networks (cafes, airports, hotels):

  • You should install and enable VPN on your phone, tablet, or laptop

  • VPN helps encrypt data, preventing information from being recorded when paying online

• This is an important step in credit card security when you travel frequently.

Install and update antivirus software

• Equip reputable antivirus software for all devices used for transactions:

  • Computer

  • Phone

• Security software helps:

  • Prevent keylogging

  • Detect and remove malware that steals card information

• Always enable automatic updates to patch new vulnerabilities.

Principles to remember

• Insecure network = easily stolen data

• Public WiFi + no VPN = high risk

• Device without antivirus = easily infected with malware

Tip 4: Check account and credit card statements regularly

Reconcile statements every payment cycle

• Each month, compare your card statement with:

  • Shopping receipts you still have

  • Transactions you remember making in the most recent period

• This is a simple yet very effective step in credit card security.

Detect unusual transactions and act immediately

• If you notice any suspicious signs such as:

  • Unfamiliar transactions, don't recall making the purchase

  • Unfamiliar amounts or merchant names

• Immediately contact your bank or card issuer to report fraud.

• Reporting early helps the bank to block transactions promptly and process them faster.

Benefits of early fraud detection

• Reduces the risk of additional unauthorized transactions

• Limits the amount you might be held responsible for

• Increases the likelihood of the bank assisting with refunds as per regulations

Habits to maintain

• Check your statements at least once a month

• Enable real-time transaction notifications if your bank supports them

• Save receipts for large expenditures

Absolutely do not provide personal information to software that creates or bypasses CVV codes

"CVV creation" or "CVV bypass" software is often fraudulent

• Tools advertised to create CVV codes or enable payments without CVV are almost certainly scams.

• Their real purpose is to collect personal information, including:

  • Credit card numbers

  • CVV codes

  • Login credentials and other sensitive data

Risks of providing information to such software

• Information can be:

  • Sold to third parties

  • Used to conduct fraudulent transactions

  • Exploited to take control of accounts

• This completely contradicts all principles of credit card security.

Safety principles to remember

• No legitimate software exists that creates or bypasses CVV codes

• Do not enter card information into unknown applications or websites

• Only use official payment channels recognized by banks and card organizations

Important message for users

• If a tool promises to do the "impossible," it's likely a scam.

• Protecting card information always starts with saying no to shady solutions.

References

1. https://www.nerdwallet.com/article/credit-cards/find-credit-card-cvv-number
2. https://www.cvvnumber.com/
3. https://money.com/what-is-a-credit-card-cvv/
4. https://www.valuewalk.com/use-card-without-cvv/
5. https://www.usa.gov/identity-theft

Translated by: Ashley Wright Nguyen.