Fraud detection

The future of fraud detection: smarter, faster, safer

Discover how AI and machine learning are reshaping fraud detection, reducing false declines and strengthening trust in digital payments.

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Strengthen trust across digital payments

Traditional detection methods simply can’t keep up with today’s increasingly sophisticated payment fraud tactics. Think about card-not-present (CNP) payments. You might be able to prevent some fraud, but could also block legitimate transactions, creating costly false declines. And it’s these kinds of disruptions that frustrate customers, erode trust and directly impact revenue, with global losses from false declines projected to exceed $264 billion by 2027. But by shifting from reactive, manual screening to proactive protection, merchants and financial institutions can minimize this risk. That’s why the future of fraud prevention will be powered by artificial intelligence (AI) and machine learning (ML) to quickly and precisely identify genuine customers.

Here we look at how AI and ML are reshaping fraud detection — exploring how automated systems analyze millions of signals to identify suspicious activity in real time, reduce false declines and strengthen trust across digital payments. You’ll also learn how fraud detection works, from data analysis to risk scoring and decision automation.

What is fraud detection?

Fraud detection relies on processes, data and models to identify and stop unauthorized or suspicious activity across the payment ecosystem. It also aims to minimize the false positives that cause friction for legitimate customers. Put simply, fraud detection seeks to answer the question: Is this transaction genuine?

To do this, fraud detection covers every stage of a financial transaction by assessing a customer’s identity when they log in, evaluating the risk of a payment in real time and managing clearing, settlement and disputes after the transaction is complete.

Like transaction monitoring, fraud detection prevents, detects and responds to threats such as payment fraud. It protects merchants, banks and customers across a wide range of payment methods, including cards, real-time payments and account-to-account transfers. As a result, effective fraud detection combines risk scoring, identity verification and case management, allowing businesses and financial institutions to approve trusted activity while isolating suspicious activity for further review.

How AI and ML enhance fraud detection

Traditional fraud detection methods rely on manual reviews and static rules — for example, flagging transactions above a certain amount from an unfamiliar IP address. However, as the volume of digital transactions grows, this approach has struggled to scale. By contrast, today’s AI and ML fraud detection models continuously analyze large datasets — including transaction patterns, device fingerprints and behavioral biometrics — to instantly flag deviations. For instance, a returning customer suddenly making multiple high-value purchases from a new country at 3am could signal account takeover. The system can automatically block, verify or escalate the transaction — often in milliseconds.

AI and ML models don’t just learn from past activity — they’re continuously fueled by real-time data from across the payments ecosystem, which allows them to identify emerging fraud patterns instantly. As digital transactions continue to accelerate, these systems are becoming faster, smarter and more adaptive. The result is real-time fraud detection that enhances accuracy, reduces false positives and provides merchants and financial institutions with stronger protection.

What is the difference between fraud detection and fraud prevention?

Fraud detection and fraud prevention are closely related but serve different roles in protecting digital payments and eCommerce transactions. Fraud detection takes place after a transaction is initiated or completed and focuses on identifying suspicious activity, such as unusual spending patterns, mismatched identities or abnormal device behavior. Fraud detection uses tools like risk scoring and real-time monitoring to flag or stop fraudulent transactions before they’re finalized.

Fraud prevention aims to stop fraud from happening in the first place, and therefore includes proactive measures such as multi-factor authentication, tokenization, biometric verification and secure payment gateways that protect customer data and reduce risk exposure.

In short, fraud detection finds and responds to fraud attempts, while fraud prevention builds barriers designed to block them. Together, they form a multi-layered strategy aimed at helping merchants and financial institutions accept more good transactions and safeguarding them from evolving digital payment threats.

How does fraud detection work?

Merchants and financial institutions face constant pressure to protect customers and transactions while maintaining smooth payment experiences. Fraud detection is at the heart of this effort, but it’s not simple. Understanding how it works — and the challenges involved — can help strengthen security, improve approval rates and reduce costly friction.

It detects fraud in a dynamic environment

Fraud is never static. Cybercriminals constantly evolve their tactics to bypass security measures, using AI-generated synthetic identities, automated bots and sophisticated social engineering. Some even leverage generative AI to craft deepfake identities or realistic fake communications. To keep up, fraud detection systems need to be adaptive. Modern AI-driven tools continuously retrain on new data, learning to detect emerging fraud patterns in near real time.

It monitors fraud across the payment lifecycle

Fraud detection doesn’t happen in one moment, it spans the entire payment lifecycle, which includes:

  • Pre-purchase: Screening user behavior and device intelligence to detect bots or synthetic accounts.
  • Checkout and payment: Real-time scoring of transaction data, geolocation and velocity indicators.
  • Post-purchase: Monitoring refund requests and dispute patterns to flag potential abuse or ‘friendly fraud’.

Globally, more than half of merchants monitor fraud during checkout and payment, while increasingly covering the refund and dispute stages. This holistic approach helps prevent losses while protecting genuine transactions.

It reduces the risk of false declines and customer friction

Achieving zero payment fraud would mean rejecting every potentially risky transaction, including those that are actually safe. So the challenge lies in finding the right balance: approving low-risk transactions seamlessly while applying additional checks or declines to higher-risk activity. AI-powered systems use ML to assess each transaction in milliseconds, producing a risk score from 0 (low risk) to 99 (high risk). This enables businesses and financial institutions to apply enhanced scrutiny where needed while approving trustworthy transactions quickly.

How do enterprises detect fraud in real time?

Enterprise fraud management relies on AI-driven detection platforms capable of screening millions of transactions per second. These systems combine:

  • Supervised and unsupervised ML models trained on global data.
  • Behavioral analytics that detect abnormal user patterns.
  • Device and network fingerprinting to identify returning or high-risk users.
  • Adaptive risk scoring to trigger step-up authentication only when necessary.

What fraud detection solutions does Visa offer?

Visa delivers a suite of AI-driven fraud detection and risk management solutions designed to offer protection across the entire transaction lifecycle.

  • Decision Manager (DM): is Visa’s enterprise-grade fraud management platform, powered by VisaNet, which is one of the world’s largest payment networks and processes more than 310 billion transactions annually. By combining expert systems with advanced ML, Decision Manager analyzes hundreds of data points per transaction to generate precise risk scores in milliseconds — 98.83% of Decision Manager transactions are resolved automatically by AI.
  • Visa Consulting and Analytics (VCA): complements Visa’s solutions and takes a structured, data-led approach to help financial institutions and merchants strengthen fraud defenses, improve authorization performance and accelerate securer growth.
  • VCA Implementation Services: extends Visa’s fraud prevention ecosystem by providing dedicated, end-to-end operational support for fraud management. VIS allows merchants and financial institutions to leverage Visa’s global expertise, tools and analytics to supplement their in-house capabilities.

Use cases

Achieving $105 million in fraud loss prevention

The Visa Protect suite of AI-powered fraud prevention solutions helps global banks and payment providers approve more legitimate transactions while reducing fraud losses. Tools like Visa Risk Manager (VRM) and Visa Advanced Authorization (VAA) simplify fraud mitigation across all card types (including non-Visa transactions), providing a unified, network-agnostic defense. For CNP payments, Visa Deep Authorization (VDA) uses AI to help issuers boost approval rates while maintaining strong protection.¹²³

Emirates National Bank of Dubai used VRM and network-agnostic VAA to consolidate multiple risk systems into one, cutting operational complexity and improving fraud detection efficiency. With over $40 billion in annual payment volume across 13 countries, it achieved $105 million in fraud loss prevention, strengthening security and customer trust.

Decision Manager: Visa’s enterprise-grade fraud management platform

Decision Manager (DM) combines ML, global data insights and expert systems to automate risk decisioning for merchants of all sizes. Enterprise clients use it for complex, high-volume fraud detection, while mid-size merchants benefit from pre-configured rules that prevent fraud without slowing approvals.

Faced with the increasing volume and associated cost of cyber-related attacks, Decision Manager helps Deutsche Bank resolve the tension between making payments easy and keeping its clients’ businesses safe. “By pairing key insights from experienced managed risk analysts with a battle-tested decision engine, we are able to build safety and convenience into the fabric of every payment experience,” said Denise Burkett-Stus, Head of Cybersource Europe. In 2021, Decision Manager prevented the equivalent of more than $22 billion in potential fraud worldwide.

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