Your Comprehensive Guide to Visa’s Acquirer Monitoring Program (VAMP)

Jul 23, 2025

Comprehensive Guide to VAMP

The global payments landscape is in constant motion, and with it, the need for robust security and compliance measures. Visa’s newly consolidated Acquirer Monitoring Program (VAMP) represents a pivotal shift, requiring heightened vigilance from merchants and acquirers alike. Navigating these changes effectively is not just about avoiding penalties; it’s about safeguarding your business’s integrity and ensuring uninterrupted operations.

At Payscout, a certified Minority Business Enterprise (MBE), we pride ourselves on empowering businesses with intelligent payment solutions and expert guidance. We understand the intricacies of payment security and compliance, and our commitment extends to ensuring our partners are well-equipped to meet evolving industry standards like VAMP.

This guide provides a comprehensive overview of VAMP, its implications, and the best practices for compliance, demonstrating how Payscout’s expertise and innovative solutions can be your trusted ally.

1. Understanding VAMP: A New Era of Risk Monitoring

VAMP, which stands for Visa Acquirer Monitoring Program, is Visa’s unified framework designed to enhance the monitoring and management of fraud and dispute risks within the payment ecosystem. It consolidates and streamlines previously separate programs: the Visa Fraud Monitoring Program (VFMP) and the Visa Dispute Monitoring Program (VDMP).

Why the Shift to VAMP? The payment industry is dynamic, with sophisticated fraudsters constantly seeking new vulnerabilities. Visa introduced VAMP to:

  • Streamline Oversight: Create a single, more efficient system for tracking fraud rates, chargebacks, and disputes.
  • Enhance Fraud Prevention: Introduce new metrics and a stronger focus on emerging fraud types, such as “enumeration” (card testing attacks).
  • Promote Proactive Measures: Encourage acquirers and merchants to adopt robust, preventative strategies rather than reactive ones.
  • Maintain System Integrity: Protect the Visa brand and the entire payment network from financial losses and reputational damage caused by fraudulent activities.

This consolidation means a more holistic view of risk for Visa, and a clearer, albeit stricter, set of expectations for businesses.

2. Key Changes and Their Impact

VAMP brings several critical updates that directly affect how acquirers and merchants manage their transactions and risks.

Consolidation of Programs

Prior to VAMP, businesses navigated separate monitoring programs for fraud and disputes. VAMP unifies these, meaning your overall performance regarding both fraud and chargebacks is assessed under a single, combined metric. This requires a more integrated approach to risk management.

New Metrics and Stricter Thresholds

VAMP introduces new or revised metrics and significantly tighter thresholds:

  • VAMP Ratio: This is the core metric, combining both reported fraudulent transactions and non-fraud disputes relative to total settled Card-Not-Present (CNP) transactions.
  • Enumeration Ratio: A new, distinct metric specifically targets card testing fraud. This highlights Visa’s increased focus on preventing brute-force attacks that validate stolen card data.

Phased Implementation and Enforcement

Understanding the timeline is crucial for planning your compliance strategy:

  • April 1, 2025: VAMP officially integrated the VDMP and VFMP programs.
  • April 1, 2025 – September 30, 2025 (Extended Advisory Period): During this initial phase, businesses exceeding thresholds receive notifications and guidance but no financial penalties. This is a critical window for adjustment.
  • October 1, 2025: Enforcement begins for businesses classified as “Excessive.” Penalties will start to apply if compliance is not met.
  • January 1, 2026: Even stricter thresholds for both “above standard” and “excessive” classifications will go into effect, further lowering the acceptable limits for fraud and disputes.

Implications for Acquirers and Merchants

  • Increased Accountability: Acquirers are held more directly responsible for the collective performance of their merchant portfolios. This will likely lead to acquirers imposing stricter internal controls and requirements on their merchants.
  • Financial Penalties: Failure to meet VAMP criteria can result in substantial fees (e.g., $5-$10 per fraudulent or disputed transaction, depending on classification) and increased scrutiny.
  • Operational Impact: Persistent non-compliance can lead to processing restrictions, higher reserves, or even the loss of the ability to process Visa transactions, severely disrupting business.
  • Proactive vs. Reactive: The emphasis shifts from merely reacting to chargebacks to proactively preventing fraud and disputes from occurring in the first place.

3. VAMP Thresholds and Calculation Details

Understanding the specific numbers and how your performance is measured is foundational to VAMP compliance.

VAMP Ratio Calculation

The VAMP Ratio focuses exclusively on Card-Not-Present (CNP) transactions and is calculated monthly using the following formula:

Count of Reported Fraudulent Transactions (TC40) + Count of Non-Fraud Disputes (TC15)​  Count of Total Settled CNP Transactions

  • Reported Fraudulent Transactions (TC40): This data comes from Transaction Chargeback (TC40) reports, which issuers file to notify acquirers of confirmed or suspected fraudulent transactions.
  • Non-Fraud Disputes (TC15): These disputes include specific reason codes (11, 12, 13) and Transaction Complete (TC15) messages, which relate to non-fraud issues like “merchandise not received” or “duplicate processing.”
  • Exclusions: Disputes resolved through pre-dispute solutions like Rapid Dispute Resolution (RDR), Chargeback Dispute Resolution Network (CDRN), or Collaboration Experience 3.0 (CE 3.0) are generally excluded from the non-fraud dispute count, incentivizing their use.

Enrollment Minimums

To be subject to VAMP’s ratio monitoring, entities must exceed a minimum monthly volume of card-absent disputes (combining fraud and non-fraud):

  • Acquirers: 1,000 or more disputes.
  • Merchants: 1,000 or more disputes.

Specific Thresholds

Merchant VAMP Ratio Thresholds:

  • Initial Threshold (Effective April 1, 2025 – December 31, 2025):
    • U.S., Canada, Europe, CEMA, AP regions: ≥ 1.5%
    • LAC region: ≥ 0.9%
  • Stricter Threshold (Effective January 1, 2026, onwards):
    • “Above Standard” classification: ≥ 0.3%
    • “Excessive” classification: ≥ 0.9% (with a minimum of 1,000 disputes for enforcement)

Acquirer VAMP Ratio Thresholds:

  • Initial Threshold (Effective April 1, 2025 – December 31, 2025):
    • “Excessive” classification: ≥ 0.5%
  • Stricter Threshold (Effective January 1, 2026, onwards):
    • “Above Standard” classification: ≥ 0.3%
    • “Excessive” classification: ≥ 0.5%

VAMP Enumeration Ratio

This separate metric monitors card testing fraud, where criminals attempt to validate stolen card numbers through numerous small transactions.

  • The VAMP Enumeration Ratio is calculated based on the count of enumerated authorization transactions (approved + declined) divided by the total count of authorization transactions (approved + declined).
  • Merchants with fewer than 300,000 enumerated transactions are generally excluded from this specific program.

4. Compliance Challenges for Businesses

The transition to VAMP presents several challenges:

  • Data Visibility: Many businesses struggle to access and accurately reconcile all the data (TC40, TC15, total settled transactions) needed to calculate their VAMP ratio precisely.
  • Integrated Approach: Moving from separate fraud and dispute management teams/strategies to a unified approach requires significant operational and technological adjustments.
  • Sophisticated Fraud: The rise of enumeration attacks demands advanced fraud detection tools that can identify and block these specific, high-volume, low-value attempts.
  • Proactive Mindset: Shifting from a reactive “clean-up” of chargebacks to a proactive “prevention-first” mentality requires investment in technology and staff training.
  • Acquirer-Merchant Relationship: Acquirers will likely impose stricter internal thresholds on their merchants to ensure their overall portfolio remains compliant, adding another layer of requirements for merchants.
  • Timelines: The relatively short grace period and rapidly approaching stricter thresholds (January 2026) mean businesses must act quickly.

5. Best Practices for VAMP Compliance

Staying compliant with VAMP requires a multi-faceted and proactive strategy. Here are key best practices:

   1. Invest in Robust Fraud Prevention Tools

  • Address Verification Service (AVS) & Card Verification Value (CVV): These foundational tools verify cardholder information, adding layers of security to CNP transactions.
  • 3-D Secure (3DS): Implementing 3-D Secure provides an additional layer of authentication for online transactions, significantly reducing fraud liability for merchants.
  • Real-time Fraud Detection: Utilize advanced Artificial Intelligence (AI) and Machine Learning (ML) powered fraud detection systems that analyze transaction behavior in real time to identify and block suspicious activity.
  • Velocity Checks & Device Fingerprinting: Implement rules that flag unusually high transaction volumes from a single card or Internet Protocol (IP) address and identify unique device characteristics to detect suspicious patterns.

   2. Implement Strategic Chargeback Reduction Strategies

  • Rapid Dispute Resolution (RDR) & Prevention Alerts: Leverage solutions like RDR and real-time alerts (e.g., from Verifi or Ethoca) to resolve disputes directly with the issuer before they escalate into formal chargebacks that count against your VAMP ratio.
  • Clear Billing Descriptors: Ensure your billing descriptors are clear and easily recognizable on customer statements to prevent “friendly fraud” or unintentional chargebacks due to customer confusion.
  • Prompt Refunds: Process refunds quickly and efficiently for legitimate customer issues. A fast refund can prevent a dispute from being filed in the first place.
  • Excellent Customer Service: Empower your customer service team to handle inquiries and complaints effectively. Resolving issues directly with customers can significantly reduce dispute volume.

   3. Monitor Dispute Ratios and Transaction Trends Closely

  • Regular Reporting: Establish a routine for consistently pulling and analyzing your TC40 and TC15 reports. Understand your current VAMP Ratio and Enumeration Ratio.
  • Identify Trends: Look for patterns in dispute reasons, common fraud types, and transaction spikes. This data is crucial for refining your prevention strategies.
  • Internal Audits: Conduct regular internal audits of your transaction data and compliance processes to identify and address any weaknesses before they lead to VAMP violations.

   4. Regularly Train Staff and Update Technology

  • Ongoing Education: Train your fraud, customer service, and sales teams on VAMP requirements, fraud trends, and best practices for dispute resolution.
  • Technology Updates: Ensure your payment gateway, fraud detection systems, and other relevant technologies are up-to-date and capable of meeting VAMP’s demands.

   5. Collaborate Closely with Your Acquirer

  • Open Communication: Maintain an open dialogue with your acquirer to understand their specific VAMP expectations and how they are monitoring your performance.
  • Data Sharing: Work with your acquirer to ensure you receive all necessary data (TC40, TC15, settlement reports) to accurately calculate your own VAMP ratios.
  • Strategic Partnership: Your acquirer is a key partner in VAMP compliance. Engage with them to develop and refine your risk management strategies.

6. How Payscout Supports Your VAMP Compliance Journey

Payscout is uniquely positioned to help merchants and acquirers not only meet but exceed VAMP compliance standards. As a certified Minority Business Enterprise (MBE), we bring a distinct perspective and a deep-rooted commitment to supporting all businesses in achieving financial security and operational excellence.

Our comprehensive suite of services and expert guidance is designed to address every aspect of VAMP compliance:

  • Tailored Fraud Prevention Solutions: Payscout provides state-of-the-art fraud detection tools, including advanced AI-powered analytics, AVS, CVV, and 3-D Secure integration. We customize these solutions to fit your specific risk profile and business model, helping you block fraudulent transactions before they impact your VAMP ratio.
  • Comprehensive Chargeback Management Tools: We equip you with powerful chargeback management solutions, including seamless integration with Rapid Dispute Resolution (RDR) and other prevention alert systems. Our tools help you intercept disputes early, resolve them efficiently, and prevent them from escalating into costly chargebacks that contribute to your VAMP ratio.
  • Expert Guidance and Consulting: Our team of payment industry experts offers invaluable consulting services. We help you interpret VAMP data, understand your risk exposure, and develop personalized remediation plans. We’ll guide you through implementing best practices, ensuring your team is trained and your technology is optimized for VAMP.
  • Proactive Monitoring and Reporting: Payscout’s platforms provide detailed reporting and analytics, giving you real-time visibility into your transaction data, fraud rates, and dispute volumes. This enables you to proactively monitor your VAMP ratios and identify potential issues before they lead to penalties.
  • Secure, Compliant Payment Processing: Our proprietary Paywire platform is built with robust security and compliance at its core, adhering to the highest industry standards like Payment Card Industry Data Security Standard (PCI DSS). This ensures that your payment processing foundation is secure and reliable.

By partnering with Payscout, you gain a strategic ally dedicated to your success. We help you not only avoid VAMP penalties but also foster a more secure, efficient, and profitable payment environment. Our MBE status reflects our dedication to diversity, quality, and impactful partnerships.

Conclusion: Proactive Compliance for a Secure Future

Visa’s Acquirer Monitoring Program (VAMP) is more than just a new set of rules; it’s a clear signal from Visa about the increasing importance of proactive fraud prevention and dispute management. While the stricter thresholds and penalties may seem daunting, they also present an opportunity to fortify your payment processes and build greater trust with your customers.

Payscout is ready to help you navigate this new landscape. With our cutting-edge solutions, deep industry expertise, and commitment as a certified Minority Business Enterprise, we provide the tools and support you need to ensure VAMP compliance, protect your revenue, and secure your business for the future.

Don’t leave your compliance to chance. Contact Payscout today at sales@payscout.com to learn how we can help you stay ahead of VAMP and empower your business with secure and seamless payment processing.

Let’s get your payment processing on the right track.

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