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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.
FAQs
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Small and medium-sized businesses require scalable, easy-to-implement tools that deliver enterprise-grade protection without the overhead. The best solutions combine AI-powered automation, real-time decisioning and low-code integration. Key features to look for include:
- Out-of-the-box ML models that learn from global data
- Intuitive dashboards for managing fraud rules and reviewing cases
- Integration with major payment gateways and eCommerce platforms
- Transparent pricing that scales with transaction volume
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For enterprises processing millions of transactions across regions and channels, scalability and precision are essential requirements. Top-tier enterprise solutions should offer:
- Customizable risk rules engines for policy alignment
- Advanced analytics dashboards for real-time insights
- Cross-channel data unification to break down silos
- Integration with CRM and case management systems
- Continuous ML model updates based on evolving threat patterns
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Banks and financial institutions face the challenge of balancing stringent compliance requirements with providing a seamless customer experience. To improve their fraud monitoring strategies, banks and financial institutions can:
- Adopt real-time AI fraud detection models that continuously learn from global payment patterns.
- Integrate identity and behavioral analytics to detect account takeover attempts early.
- Leverage data from networks like Visa to gain a broader fraud intelligence perspective.
- Implement automated alert and case management systems to streamline investigation workflows.
- Use Visa Consulting and Analytics (VCA) and its data-driven insights to assess and improve fraud monitoring strategies.
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The ideal solution depends on the institution's size, specific needs, customer base and existing technology stack — and involves balancing sophisticated features with scalability and ease of integration. Leading platforms differentiate themselves by using advanced AI to provide real-time, end-to-end protection across all banking channels, from mobile apps to wire transfers. When selecting fraud detection software, banks typically look for the following critical capabilities:
- Real-time, cross-channel monitoring: The software must be able to analyze data from all customer touchpoints simultaneously — including online banking, mobile apps, ATMs and internal systems — to detect and stop fraud as it happens.
- Advanced AI and ML: Banks need systems that go beyond simple rules. AI-powered platforms can analyze customer behavior, identify subtle anomalies and adapt to new, sophisticated fraud tactics without manual intervention, which is crucial for reducing both fraud losses and false positives.
- Scalability and performance: The platform must be able to process massive volumes of transactions with very low latency (in milliseconds) to ensure that security checks do not negatively impact the customer experience.
- Holistic fraud and financial crime view: Leading solutions offer a unified platform that can manage various types of risk, including payment fraud, anti-money laundering (AML) and scams, providing a single view of a customer's risk profile.
- Flexible and explainable AI: Regulated institutions require ‘explainable AI’, which means the system must be able to provide a clear rationale for why a transaction was flagged as fraudulent. This is essential for compliance, audits and resolving customer disputes.
- Efficient case management and workflow automation: An effective solution includes tools that streamline the investigation process for fraud analysts. This helps them prioritize alerts, gather necessary information and resolve cases more quickly, reducing operational costs.
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AI-powered fraud detection delivers clear advantages for merchants, banks and financial institutions. By analyzing transactions in real time, it identifies suspicious activity within milliseconds — reducing fraud losses without slowing genuine payments. Continuous ML improves accuracy and lowers false positives, helping businesses protect revenue while enhancing customer experience. These systems scale effortlessly to handle peak volumes and quickly adapt to new fraud patterns, such as synthetic identities or AI-driven attacks. Automation also reduces manual reviews, cutting operational costs. For banks, this means stronger risk control, fewer chargebacks and sustained customer trust across the entire transaction lifecycle.
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Financial institutions today rely on a combination of advanced fraud detection services, with AI-powered behavioral analytics platforms to analyze transaction patterns in real-time and adapt to evolving fraud tactics. Multi-layered authentication services have proven highly effective by verifying user identity through typing patterns, mouse movements and device fingerprinting rather than relying solely on passwords.
Solutions that leverage shared intelligence across financial institutions to identify fraud patterns more quickly excel at detecting previously unknown fraud schemes through unsupervised learning algorithms. The most effective approach typically combines multiple services — real-time transaction monitoring, device intelligence, behavioral analytics and network analysis — creating a comprehensive defense system that balances fraud prevention with minimal friction for legitimate customers. Visa’s composable solutions can address the full spectrum of fraud types including account takeover, synthetic identity fraud, payment fraud and money laundering.
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Fraud monitoring differs between small- and medium-sized businesses (SMBs) and large enterprises, largely due to disparities in resources and complexity. Enterprises typically employ dedicated in-house fraud specialist teams who manage sophisticated, multi-layered fraud management systems. These enterprise-grade solutions offer a holistic approach, integrating advanced analytics, machine learning and real-time data analysis to protect against complex fraud across all business channels. In contrast, SMBs often lack the financial and human resources for such extensive measures and tend to rely on more automated, ‘plug and play’ fraud detection tools, which may be provided by their financial institutions. Their approach is necessarily more streamlined, focusing on ease of use and covering essential vulnerabilities without requiring constant oversight.
The nature of the threats and defensive strategies also varies. Enterprises often face highly sophisticated, organized, large-scale attacks. Their defense requires a robust, integrated platform capable of correlating data from numerous sources to identify complex fraud patterns in real-time. SMBs, on the other hand, are increasingly seen as softer targets for common scams like phishing, fake invoices and ransomware. Fraudsters are even adapting consumer identity theft tactics to target established small businesses. Consequently, SMB fraud prevention often focuses on foundational security measures, such as employee education on scam recognition, implementing internal controls like the separation of duties and securing online transactions.
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Global companies manage banking fraud detection by deploying enterprise fraud management systems that use a layered, technology-driven approach to monitor transactions and user activity in real-time across all channels. These solutions are essential for handling the speed and complexity of digital transactions worldwide. They leverage AI and ML to analyze vast amounts of data, detect anomalies and identify complex fraud patterns that would be invisible to human analysts. By integrating data from various sources, these platforms provide a unified view of risk, allowing institutions to stop suspicious activity instantly, reduce false positives and adapt to evolving threats from international fraud rings.
Key tools and technologies that help global companies detect banking fraud include:
- AI and ML platforms: These are the core of modern fraud detection, using algorithms to analyze customer behavior, transaction history and other data points to predict and flag potential fraud in real-time. They can identify everything from credit card fraud to account takeovers by recognizing deviations from normal patterns.
- Real-time transaction monitoring: These systems analyze transactions as they happen across various channels like mobile banking, wire transfers and e-commerce. They score the risk of each transaction instantly, allowing banks to block suspicious payments before they are completed.
- Behavioral analytics and biometrics: This technology establishes a baseline of normal user behavior and then flags unusual activity, such as changes in login patterns, geolocation or even how a person interacts with their device. This helps detect account takeovers and other forms of identity-related fraud.
- Identity verification and authentication tools: To combat new account fraud and account takeovers, companies use multi-factor authentication and digital identity verification services. These tools verify a user's identity during onboarding and high-risk transactions by analyzing documents, device data and other digital footprints.
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The most common fraud detection tools include a mix of rule-based systems, ML models and real-time analytics platforms. Key categories include:
- Transaction monitoring systems: Tracks financial activity for anomalies or suspicious patterns
- Identity verification tools: Confirms customer identities using biometrics or document verification
- Behavioral analytics: Detects deviations in normal user behavior, such as login location or a different device
- Fraud detection platforms: Powered by ML to continuously learn from historical data to predict and prevent fraud
- Case management systems: Helps compliance teams investigate, document and report suspicious activities efficiently
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Companies choose a fraud detection solution based on risk exposure, transaction volume, regulatory requirements and integration needs. The selection process typically includes for following steps:
- Assess risk areas: Identify fraud types most relevant to the business (for example, these could be security risks such as payment fraud, identity theft or money laundering).
- Evaluate scalability and flexibility: Ensure the solution adapts as transaction volumes and risks grow.
- Consider technology compatibility: Find a system that integrates easily with existing banking, CRM or payment platforms — depending on what industry the company operates within.
- Look at analytics capabilities: Review AI-driven solutions and platforms powered by ML that minimize false positives and continuously improve accuracy.
- Check compliance support: Tools should align with regulations in relevant regions and industries.
- Visa. (n.d.). Optimize authorization performance with Visa Protect [Web page].
- Visa. (2024, March 27). Visa’s growing services business infused with new AI-powered products [Press release].
- O’Connor, K. (2024, March 28). Visa powers three ‘adaptive’ fraud prevention solutions with AI [Web article]. Payment Expert.