Comprehensive Guide to Credit Card Fraud Prevention for Businesses

Preventing or at least minimising credit card fraud is every merchant’s responsibility, both in-store and online. This need has become even more urgent as online shopping and digital payments have made it easier for people to commit fraud (deceiving others for unlawful gain).

Fraud prevention for businesses includes all the tools and processes a business can use to detect and prevent fraudulent transactions before they are completed and result in financial loss or being barred from opening another merchant account.

If you run a business, it’s essential to be familiar with:

• Why fraud prevention is so important for businesses
• Common types of payment fraud
• Red flags to look out for
• Checks for card-present transactions
• Checks for card-not-present transactions
• How to balance security and ease of use
• The role of your payment processor in merchant credit card fraud prevention

Why Fraud Prevention Is Essential for Your Business

Whether your business is large or small, it’s essential to understand the sources of potential fraud and implement fraud management technologies that prevent these transactions from going through without compromising the customer experience.

The Cost of Fraud for Businesses

According to the European Banking Authority (EBA) and European Central Bank (ECB) 2025 Payment Fraud Report, total fraud in 2024 reached approximately EUR 4.2 billion, with EUR 2.5 billion from credit transfers and EUR 1.3 billion from card payments.

In e-commerce, fraudulent activity can not only negatively affect revenue if your company isn’t prepared, but also tarnish your reputation and harm your customers. If a customer detects an unauthorized transaction, they may contact their credit card issuer to reverse the transaction and initiate a chargeback investigation.

In severe cases, excessive chargebacks and severe fraud can also lead to increased fees or contract termination with your merchant services provider.

Understanding the Types of Fraud Businesses Face

There are several different types of fraudulent transactions that business owners need to be aware of to develop a fraud risk management strategy. Each business owner will need to decide the level of risk that they are willing to accept from external sources and work with their merchant services provider to prevent (and detect) fraudulent behavior while letting authentic payments through. Our e-commerce fraud protection ideas are an excellent place to start.

Emerging and AI-Powered Fraud

Today, fraud is becoming increasingly sophisticated due to machine learning and artificial intelligence. Fraudsters use advanced tools that are increasingly difficult to detect with traditional methods.

Some common techniques used by fraudsters include:

Deepfakes

Deepfakes are AI-generated images and videos that imitate real people, such as executives or customers. These fake identities can then gain the trust of businesses, leading to fraudulent transaction authorisations.

Automated Phishing

Automated phishing occurs when AI Bots send repeated and highly targeted phishing messages.

Synthetic Identity Fraud

Synthetic Identity fraud happens when fraudsters create entirely new identities using stolen or entirely false information to create accounts and make purchases.

AI Bots

AI Bots are automated programs that can imitate human behaviour to steal sensitive customer information, test stolen cards, or complete fraudulent transactions.

Common Types of Payment Fraud

Payment fraud usually occurs when a customer’s card information is stolen and used to make unauthorised transactions.

There are five primary kinds of payment fraud:

Identity Theft ( Account Takeover)

Identity theft occurs when an individual steals another person’s card, login details, bank account information, and identity information and makes purchases as if they were that person. The theft of login details for unlawful gain is also known as account takeover fraud.

Friendly Fraud

Friendly fraud refers to genuine customers who claim they did not receive the goods and initiate a chargeback. The benefit to the customer is that they use the goods without paying for them. The chargeback transaction, however, increases the brand’s chargeback rate and results in a financial loss, which is why it’s best to prevent credit card chargebacks.

Family Fraud

Family fraud occurs when a cardholder’s relative uses their card to make unauthorised transactions. This is sometimes caused by a simple lack of communication between family members about a transaction, and at other times is an intentional act.

Clean Fraud

Clean fraud is the hardest to block because the purchases appear legitimate. This kind of fraud occurs when individuals steal card details by intercepting messages between parties, convincing customers to make purchases on fake websites, or buying them from third parties. This can also happen within a company if card details are accessible to employees.

Triangulation Fraud

This is a three-stage kind of fraud that hurts legitimate businesses and customers:

1. The perpetrator creates a fake or imitation website.
2. They entice customers to make purchases on the site (these purchases never arrive).
3. They use the card information collected to make other unauthorised purchases.

In the face of these common fraud attacks, businesses suffer when legitimate cardholders realise their details have been stolen and file a chargeback with the issuing bank. The company not only has to cover the cost of the chargeback (while losing any products that were shipped), but they also lose:

• Time spent investigating the case
• Brand image and trust if their brand was impersonated
• Good standing with their acquiring bank if the number of chargebacks passes the maximum threshold

Fraud-Detection: Red-Flags to Look Out For

Understanding the types of fraud is key to setting up an effective fraud prevention strategy, but detecting anomalies and fraud signals quickly will ensure it is implemented in time.

The following are some red flags to look out for during transactions:

• Repetitive declined attempts followed by a large approved transaction.
• Mismatched customer information ( IP geolocation vs. shipping address, or “Time zone”)
• Large orders from new accounts (often with “Express” shipping).
• Rapid-fire “Card Testing” (multiple small transactions in seconds).

Today, modern fraud prevention platforms automatically monitor these signals, assigning each a transaction risk score before approval.

In-Store Credit Card Fraud Prevention Strategies

Any business that accepts credit and debit cards is vulnerable to fraudulent transactions. These typically take place when:

• The card being used was physically stolen
• The card is being used by a family member without the cardholder’s knowledge or consent
• A counterfeit credit card is being used

Fortunately, a few simple checks at the checkout are usually sufficient for merchant credit card fraud prevention. Make sure that your employees follow these steps consistently, as they only take a few seconds and can save you significant losses of time and money trying to recuperate the goods.

Always Check the Signature on the Card

Credit card fraud can often be detected simply by comparing the signature on the card to the signature of the customer on the receipt. If the two signatures don’t match, you’ll know that the credit or debit card is not theirs. Never process a purchase made with a physical card that is not signed, as you won’t be able to identify fraudulent transactions.

Reject Cards that Are Damaged or Defaced

Most cards today come with a chip as well as a magnetic stripe that contains embedded information. Counterfeit cards won’t have these security features. In an attempt to bypass your security checks, fraudsters might present a card that is damaged or defaced and ask you to enter the card number manually. In this case, ask for a different payment method or decline to process the purchase.

Ask for the Customer’s ID

Both traditional fraud and family fraud can occur when a physical card is stolen. You can prevent these transactions from going through by asking the customer for a photo ID. If the name on their ID doesn’t match the name that is printed on the card, refuse to put the transaction through. In some cases, parents do allow their children to use their cards, but this privilege can be abused, and it’s better to be safe than sorry.

Verify Receipts before Issuing a Refund

Refunds for faulty goods or a change of mind are an important part of customer service. However, this loophole also provides an opportunity for fraud. Fraudulent activity can take place when:

1. The customer tries to return stolen merchandise
2. Someone tries to return goods with a counterfeit receipt

Employees who work in the returns department can be trained in merchant credit card fraud prevention strategies, such as verifying the original purchase date in the system and requiring that the customer provide a receipt. Be sure to make your returns policy clear so that customers know what to expect.

Don’t Accept Threatening Behaviour

Unauthorised customers may try to bully the cashier into processing a sale even when they don’t pass the security checks. While a legitimate customer may genuinely have forgotten or lost their ID, or for some reason the chip is not working, these problems are much more characteristic of a fraudster. Have a clear “no aggression” policy displayed at the checkout and provide a way for your cashiers to discreetly call for help.

Communicate With Your Payment Processor

If a legitimate customer wants to make an unusually large order and pay for it with their credit card, it’s helpful to notify your payment processor beforehand so that they don’t flag the transaction as suspicious. Likewise, if you do let a fraudulent transaction through and later discover it wasn’t a legitimate customer, you should notify the cardholder, card network, and issuing bank so that they can put a block on the stolen card.

Create Effective In-House Policies

If your employees handle sensitive information, make it clear from the start that there are legal implications for compromising a customer’s data. It is also important to have a whistleblower policy that encourages staff to report breaches or suspected transactions.

Before onboarding new employees, particularly in senior management, conduct thorough criminal background checks and speak with their past employers.

Preventing Credit Card Fraud for Card-Not-Present Transactions

Card-not-present fraud is much easier to perform than card-present fraud simply because there is no direct communication with the customer, and you can’t see their physical card. Offering online payments, telephone payments, or mail order payments automatically puts merchants at risk for payment fraud.

E-Commerce Fraud Prevention Strategies

Several standard security measures should be part of any payment gateway. They are measures that customers expect. These e-commerce fraud prevention ideas will help you decrease fraudulent transactions significantly without causing unnecessary hassle for customers (leading to cart abandonment).

• Follow PCI compliance standards: Follow PCI DSS, in particular requirements 7-9 about implementing strong access control measures:

7. Restrict access to cardholder data

8. Assign a unique ID to each person with access to your network or e-commerce platform

9. Restrict physical access to cardholder data

• Use a third-party, PCI-compliant payment gateway: If you use a third-party, PCI-compliant payment gateway that supports secure payment processing, your provider will handle your customers’ sensitive card details for you so they are never stored on your website or computer network. This reduces your company’s PCI DSS scope and liability, and minimizes the risk of internal fraud and external breaches.
• Require strong customer authentication: Several of the most common types of fraud—family fraud, account takeover, and even clean fraud—can be reduced by creating robust customer onboarding processes with multi-factor authentication before the credit card can be processed. This could include:
  • Card verification value (CVV2 [VISA], CVC2 [MasterCard], or CID [American Express])
  • Address matching with the address verification system
  • A one-time verification code that’s sent to the customer’s mobile phone, for a new customer or an especially large-ticket item
  • Scan or photo of the customer’s credit card and ID for a faxed or online transaction that you suspect might be fraudulent
• Prevent and mitigate chargebacks: Have a clear returns policy to prevent chargebacks, and use chargeback protection tools to block any that occur before they go through.

Tip: Learn more about these strategies in our dedicated e-commerce fraud protection guide.

Security tip: When you are taking online payments, telephone payments, or mail orders, it’s very important not to keep your customers’ card numbers and security digits on file, as these details could be stolen by employees or a third-party hacker. This is also a requirement for PCI compliance. Each purchase should be treated as a new transaction, and it’s up to the customer to save their card details on their browser if they wish to save time on a future purchase.

Be careful: There is a delicate balance between ensuring merchant credit card fraud prevention and making it too much of a hassle for legitimate customers to make a purchase on your site. However, specific security measures used as needed (rather than every time) can help in cases of large or potentially suspicious transactions.

Customise Your Fraud Scrub

Fraud scrub should be included in your merchant services package. If it’s not (or if you’re charged extra for it), your merchant services provider is not doing their job. In your merchant account, you should be able to set your own transaction thresholds (ticket amount and quantity of transactions) and decide whether to block or simply flag the following kinds of suspicious activity:

• Larger-than-usual tickets
• Repeated transactions and repeated items
• Different billing and shipping addresses
• Purchases made from certain countries

You can also create an internal blacklist that blocks transactions from certain people, cards and IP addresses. This will help to prevent anyone who has made a fraudulent transaction in the past from doing it again. Some merchants also create an internal whitelist. However, a legitimate customer could still have their card details stolen in the future, so whitelists aren’t 100% foolproof.

Insight: Rules-Based vs AI-Driven Fraud Detection

Until recently, fraud management tools were rule-based: Cybersecurity firms would provide recommended fraud rules such as behavioral biometrics, transaction speed checks, and mismatched location data. The software would then be programmed to follow these rules and block any transactions that presented anomalies.

Today, machine learning is being used to develop more accurate anomaly-detection mechanisms that don’t block legitimate transactions. These fraud monitoring programs rely on advanced techniques and can be updated quickly and easily as fraud trends change.

AI today will also look at patterns and behaviour, such as typing speed, mouse movement, and device behaviour, to determine whether it is dealing with a bot or a genuine user.

Additional Checks for Flagged Transactions

Once suspicious transactions are marked for review, there are several things you can do to work out whether the transaction is legitimate.

Online Checks

Online tools can help with merchant credit card fraud prevention when a transaction is flagged as suspicious. Simply enter the customer’s name, phone number, address, or email address, and see if the details match up. For example, if the reverse lookup results indicate that the name and address that are being used to purchase Halo Infinite correspond to a 90-year-old woman in Cornwall, it’s a likely case of credit card fraud.

• Truecaller Reverse Phone Number Lookup

Search people by landline or mobile phone number, check area codes, get notified if a call is from a known scammer, and more.

• Country Calling Codes

Match a calling code to its country of origin.

• Source Forge

A list of international reverse lookup directories (some free and some paid).

• IDology

Verifies the identity and location of the customer. This is a paid service.

• Reverse Phone Lookup

Look up the phone numbers of customers from the United States for more information about the customer and where they are located.

• Anywho

Look up customers in the U.S. by name and state, and view their age and recorded address.

• US Search

Look up customers in the U.S. by name, address, or telephone number and match their email address, phone number, age, and social media profiles.

Call the Customer

This might seem like the most obvious (albeit the most time-intensive) strategy for credit card fraud detection. It is a good idea if you have enough staff. Soon after a customer makes a purchase, call them using the phone number provided, welcome them aboard, and check that they really authorised the purchase. You’ll quickly find out whether the number is genuine and can notify any surprised cardholders of fraud.

Fraud Prevention Checklist

Take these technical and operational steps to prevent credit card fraud in your business:

Technical Steps:

☐ Ensure PCI compliance

☐ Use a PCI-compliant gateway

☐ Use multi-factor authentication

☐ Use machine learning fraud detection tools

Operational Steps:

☐ Implement real-time monitoring of transactions

☐ Set chargeback monitoring alerts

☐ Limit employee access to sensitive data

☐ Conduct regular fraud audits

Fraud Management FAQs

What is the most common type of online payment fraud?

Identity theft and account takeover fraud are the most common types of online payment fraud today.

How can small businesses prevent credit card fraud?

Small businesses can prevent fraud by ensuring that they have secure payment gateways with multi-factor authentication. They should regularly monitor transactions and limit employee access to sensitive data.

What is the difference between fraud prevention and fraud detection?

Fraud prevention stops fraudulent transactions before they occur, while fraud detection identifies suspicious transactions after they occur.

How do chargebacks affect businesses?

High chargeback rates can result in financial penalties, reputational damage, and potential termination of merchant accounts.

Can machine learning reduce fraud?

Yes. Machine learning tools are effective for fraud prevention, as they analyze transaction patterns and detect suspicious behavior quickly.

The Bottom Line on Preventing Credit Card Fraud

Losses from credit card fraud are inevitable, but you can keep them to a minimum. Preventing fraud-related losses requires an integrated fraud management approach that blocks wrongful requests without generating too many false positives.

An effective strategy should include:

• PCI compliance
• AI-powered monitoring
• Strong authentification
• Internal access controls

While it’s an ongoing cost and process for merchants, effective fraud management is a necessity that no business can afford to be without.

Published: December 15, 2021
Last updated: March 31, 2026