How to strengthen eCommerce fraud protection

Online shopping continues to grow across the UK, and so does fraud. In the first half of 2025 alone, criminals stole more than £629 million through fraud and scams across over two million cases.

Around one in five UK adults say they have lost money to a scam in the past year and as online commerce continues to grow, so too does the sophistication of fraud targeting digital businesses. For merchants operating online, fraud prevention is no longer simply a defensive measure but a critical part of maintaining customer trust, protecting revenue and ensuring smooth payment operations. A well-designed fraud strategy must strike a careful balance: stopping malicious activity without introducing unnecessary friction for legitimate customers.

This balance is particularly important as consumers increasingly expect fast, seamless checkout experiences. Overly aggressive fraud controls can lead to false declines, where genuine transactions are mistakenly blocked. These not only frustrate customers but can also result in lost sales and long-term damage to brand loyalty.

For modern merchants, strengthening eCommerce fraud protection requires a layered approach that combines technology, data analysis and intelligent payment infrastructure.

Understanding eCommerce fraud

eCommerce fraud refers to any unauthorised or deceptive activity conducted through online transactions with the aim of obtaining financial gain. Because online purchases do not involve physical card verification, criminals exploit weaknesses in payment flows, account systems and promotional mechanisms.

One of the most common forms of fraud is card-not-present (CNP) fraud, where stolen card details are used to make online purchases. Since the cardholder is not physically present during the transaction, verifying the legitimacy of the payment becomes more complex. Staggeringly, 81% of all UK card fraud occurs through card-not-present transactions.

Another major threat is account takeover fraud. In 2024, account takeover fraud in the UK resulted in £39.4 million in losses across 84,937 cases. In this scenario, attackers gain access to legitimate customer accounts, often through credential stuffing or phishing attacks. Once inside, fraudsters may change account details, make purchases using stored payment methods or redeem loyalty rewards. This is an area which has declinedin recent years,

With 18% of UK consumers admitting to opening multiple accounts specifically to take advantage of promotional offers, a further growing category is promotion and incentive abuse. Fraudsters create multiple accounts or manipulate referral systems to repeatedly claim sign-up bonuses, discounts or loyalty benefits. While these activities may appear less severe than payment fraud, they can significantly distort marketing performance metrics and erode profit margins. Furthermore, 55% of online merchants reported an increase in promotion abuse, according to industry research on ecommerce fraud trends.

The real cost of fraud for online businesses

Fraud has far-reaching consequences that extend well beyond the initial fraudulent transaction. When a fraudulent payment occurs, merchants typically face chargebacks, where the cardholder disputes the transaction with their bank. Chargebacks often result in lost revenue, additional fees and operational costs associated with managing disputes.

High chargeback ratios can also damage a merchant’s reputation with payment processors and issuing banks. In severe cases, businesses may face increased processing fees or even lose the ability to accept certain payment methods.

Fraud prevention also has operational implications. Many businesses rely on manual reviews to investigate suspicious transactions, which consumes time and resources. As transaction volumes grow, manual processes quickly become inefficient and unsustainable.

There is also the issue of false declines, where legitimate transactions are incorrectly rejected due to overly strict fraud rules. Studies consistently show that false declines can cost merchants more revenue than fraud itself. Customers who encounter payment friction are often quick to abandon their purchase and may not return.

The importance of layered fraud protection

Given the complexity of modern fraud schemes, relying on a single defensive measure is rarely sufficient. Instead, successful merchants deploy layered fraud protection, combining multiple safeguards across the customer journey.

Fraud detection should begin at account creation, where suspicious sign-ups can be identified through device fingerprinting, IP analysis and behavioural monitoring. This helps prevent fraudulent accounts from entering the system in the first place.

During the checkout process, businesses can use real-time transaction analysis to evaluate payment behaviour. Signals such as unusual purchase amounts, geographic mismatches or abnormal device activity can trigger additional verification steps.

Technologies such as 3-D Secure authentication, required under regulations like PSD2’s Strong Customer Authentication in the UK and Europe, add an additional layer of identity verification while maintaining a relatively smooth user experience.

Post-transaction monitoring is equally important. Refund patterns, rapid repeat purchases and unusual account activity can indicate emerging fraud attempts. Continuous monitoring ensures that businesses can adapt to evolving threats.

The role of payment infrastructure in fraud prevention

Fraud protection is closely tied to the payment infrastructure a business uses. Modern payment orchestration platforms allow merchants to integrate multiple fraud detection tools, payment gateways and verification systems within a single framework.

Platforms such as Paymentflo help businesses manage complex payment environments by orchestrating transactions across multiple providers and integrating advanced fraud monitoring capabilities. This type of infrastructure allows merchants to evaluate transactions in real time while maintaining flexibility across payment routes and risk management tools.

By centralising payment intelligence, merchants gain better visibility into transaction patterns and potential vulnerabilities. Payment orchestration platforms also enable businesses to adapt quickly by adding new fraud tools or adjusting rules without rebuilding their entire payment stack.

Building a future-ready fraud strategy

Fraud prevention should not be viewed as a one-time implementation but as an ongoing strategy that evolves alongside the digital payments ecosystem. Fraudsters constantly develop new techniques, often leveraging automation and artificial intelligence to scale attacks.

To remain resilient, merchants should focus on several core principles:

• Data-driven decision making using transaction insights and behavioural analytics
• Flexible payment infrastructure that allows rapid integration of new fraud detection tools
• Continuous monitoring across the entire customer lifecycle
• Balanced security controls that minimise friction for legitimate customers

Collaboration between fraud teams, payment specialists and technology providers is also essential. A coordinated approach ensures that fraud prevention measures support business growth rather than restricting it.

Conclusion

As eCommerce continues to expand, fraud will remain an unavoidable challenge for online businesses. However, the right strategy can significantly reduce risk while maintaining a seamless customer experience.

By adopting layered protection methods, leveraging intelligent payment infrastructure and continuously analysing transaction behaviour, merchants can protect both their revenue and their reputation. Platforms such as Paymentflo demonstrate how modern payment orchestration can support this effort by integrating fraud monitoring directly into the payment flow.

Ultimately, the most effective fraud prevention strategies are those that combine strong security with frictionless payments, enabling businesses to grow confidently in an increasingly complex digital marketplace.

Learn how Paymentflo brings security to your online eCommerce platform by booking a demo today.