Understanding VISA VAMP

Understanding VISA VAMP

Visa’s Acquirer Monitoring Program, known as VAMP, is a global compliance and risk oversight framework designed to ensure that acquirers, payment processors, and merchants operate safely, consistently, and in alignment with Visa’s rules. VAMP helps protect the payments ecosystem by reducing fraud, monitoring unusual or high-risk activity, and confirming that underwriting and portfolio management practices remain strong.

VAMP is not a penalty program. It does not function the way Visa’s dispute monitoring programs work. Instead, it is a structured method for Visa to confirm that acquirers have appropriate controls, documentation, and oversight in place. When Visa detects elevated dispute activity, irregular transaction patterns, outdated merchant files, or missing documentation, it may request clarification or remediation. The goal is to improve stability across the network and prevent issues before they impact merchants.

VAMP was developed in response to increased fraud trends, evolving digital payment behaviors, and growing regulatory expectations worldwide. Visa is placing greater emphasis on the accuracy of merchant onboarding, the completeness of underwriting files, the use of correct MCCs, and the ongoing monitoring of merchant portfolios. By strengthening these areas, Visa helps acquirers prevent unauthorized activity, reduce misuse of merchant accounts, and ensure that high-risk behaviors are detected early.

For most merchants, VAMP requires little to no direct action. Visa’s inquiries flow to the acquirer and processor, not to individual merchants. Your processing continues without interruption. In some situations Viking may reach out for small updates such as a current business license, ownership verification, a website review, or a clarification about your products and services. These requests are simple, quick, and designed solely to maintain alignment with Visa’s guidelines.

Viking is approaching VAMP with a proactive, portfolio-wide strategy that protects merchants and strengthens long-term processing reliability. Our compliance, underwriting, and risk teams have expanded documentation standards, improved MCC accuracy, and upgraded identity, KYB, and bank-account verification tools. We have also enhanced transactional monitoring to identify early indicators of fraud or unusual behavior across the portfolio.

In partnership with our sponsor banks, Viking has increased transparency through improved reporting, updated merchant files, and ongoing communication around risk trends. This allows potential concerns to be addressed early and keeps merchant processing stable and uninterrupted.

  • Earlier fraud and dispute monitoring thresholds with automated pattern detection
  • Comprehensive audits of all merchant underwriting files to confirm Visa and bank compliance
  • Updated training for onboarding, underwriting, and compliance teams
  • Deployment of advanced KYB and KYC tools to reduce onboarding risk
  • Continuous policy updates to match Visa and sponsor-bank expectations
  • Strengthening of MCC classification and merchant data accuracy
  • Portfolio-wide merchant reviews to ensure proper business information and operational descriptions

A stronger compliance and monitoring environment reduces fraud, lowers dispute exposure, improves portfolio health, and helps preserve long-term access to card processing. Merchants benefit from:

  • Continued, uninterrupted processing
  • Faster identification of operational issues or fraud patterns
  • Fewer unexpected disputes and chargebacks from upstream problems
  • A more secure environment for accepting Visa cards
  • A more stable relationship between Viking, our sponsor banks, and the Visa network

For most merchants nothing will change. From time to time Viking may request updated documentation to ensure your file remains compliant. These requests are routine and typically take only a few minutes to complete. Payment processing continues as normal and real-time funding through VIKExpress is unaffected.

Viking is committed to making the VAMP process seamless and supportive. Every action taken under VAMP is designed to strengthen merchant protections, maintain high-quality bank relationships, and ensure long-term access to secure payment processing. If you have questions or need help with any compliance documentation, our team is ready to assist. reach out to your Viking representative today.

December 1, 2025

About Robert Hollifield

He is an accomplished director with 15 years of experience in underwriting, risk management, and compliance in the payments space. He specializes in high-risk merchant oversight, regulatory adherence, and improving end-to-end payment processes to ensure secure, reliable operations. He received his BS from the University of New Hampshire.

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Upcoming NACHA Rules Changes: Implications for Originators and Merchants

Upcoming NACHA Rules Changes

Implications for Originators and Merchants

As a payment compliance specialist, it is critical to stay abreast of the latest NACHA (National Automated Clearing House Association) rule changes. Two sets of amendments are set to take effect this year—on June 21 and October 1, 2024. Some of these changes will impact originators and merchants significantly, emphasizing the need for proactive adjustments to compliance and operational strategies.

June 21, 2024: Minor Rules Topics

The first wave of changes focuses on minor rule topics. Minor changes to the Rule have little to no impact on ACH participants and no significant processing financial impact.

  1. General Rule /Definition of WEB Entries– The updated NACHA rule clarifies the use of WEB entries, which are transactions initiated by a consumer over the internet or a wireless network. The new definition eliminates confusion by specifying that all consumer-to-consumer credits must use the WEB SEC code, regardless of the internet or wireless network being the method of initiation.
  2. Definition of Originator– The updated rule provides a clearer definition of an Originator, stating that it is the party authorized by the Receiver to credit or debit the Receiver’s account at the RDFI (Receiving Depository Financial Institution). This clarification helps in precisely identifying the responsible entity in a transaction, thus reducing ambiguities and potential disputes between parties involved in ACH transactions
  3. Originator Action on Notice of Change– This rule requires Originators to take prompt action upon receiving a Notice of Change (NOC) from the RDFI. The NOC indicates necessary corrections to the information within an ACH entry. Originators must make the specified changes within six banking days or before the next entry, whichever is later.
  4. Data Security Requirements– The updated rule extends the data security requirements to all non-consumer Originators, Third-Party Service Providers, and Third-Party Senders.
  5. Use of Prenotification Entries– The revised rule on prenotification entries provides clarity on their use and the handling of responses from RDFIs. Prenotification entries are optional but recommended for verifying account information before initiating live transactions. Originators can use these entries to ensure that account details are correct, reducing the risk of errors and rejected transactions. If an RDFI responds to a prenotification with a NOC, the Originator must address the indicated issues promptly
  6. Clarification of Terminology – Subsequent Entries– The rule clarifies the term “Subsequent Entries,” referring to entries that follow an initial authorization. These can be initiated by the consumer through actions such as phone calls or online requests. The updated rule allows greater flexibility in the use of Standard Entry Class (SEC) codes for these subsequent entries, accommodating various methods of initiation and ensuring that authorization requirements are met appropriately

October 1, 2024: Risk Management Topics

The second set of changes, effective October 1, centers around risk management, reflecting NACHA’s ongoing efforts to enhance the security and reliability of the ACH Network:

  1. Codifying Expanded Use of Return Reason Code R17– The updated rule codifies the expanded use of Return Reason Code R17 to enhance the identification and management of fraudulent activities. This rule includes the following specifics:
    • R17 + “QUESTIONABLE”: The addition of the word “QUESTIONABLE” in the return addenda record signifies a potential fraud alert on the receiving bank account. This helps financial institutions quickly identify transactions that may require further scrutiny for fraud
    • Impact on Unauthorized Return Rates: These returns will not be counted in unauthorized return rates, thus not affecting the metrics used to evaluate the frequency of unauthorized transactions
    • This new Rule also includes references to a newly defined term, False Pretenses: The inducement of a payment by a Person misrepresenting (a) that Person’s identity, (b) that Person’s association with or authority to act on behalf of another Person, or (c) the ownership of an account to be credited.”
      This definition covers common fraud scenarios such as Business Email Compromise (BEC), vendor impersonation, payroll impersonation, and other payee impersonations, and complements language on “unauthorized credits” (account takeover scenario). It does not cover scams involving fake, non-existent or poor-quality goods or services.
    • Expanded Use of ODFI Request for Return/R06–This rule expands the circumstances under which an Originating Depository Financial Institution (ODFI) can request a return of an entry using Return Reason Code R06 (Return per ODFI’s Request). This expansion aims to provide more flexibility and tools for ODFIs to manage erroneous or problematic entries, ensuring better correction of mistakes and reducing potential risks associated with such entries
    • Ensure your loan management and payment processing systems are updated for NACHA’s new R17 rule. This rule allows RDFIs to use Return Reason Code R17 with the descriptor “QUESTIONABLE” in the Addenda Information field to flag transactions that may be suspicious or fraudulent. Updating your systems will help differentiate these returns from routine account errors and maintain compliance with NACHA’s standards.
  2. Additional Funds Availability Exceptions– The rule introduces new exceptions to the funds availability requirements, allowing RDFIs more time to investigate suspicious transactions before making funds available to the account holder. This extension is critical in scenarios where there is a high likelihood of fraud, enabling RDFIs to ensure that the transaction is legitimate before releasing the funds. This change aims to reduce the risk of fraudulent withdrawals and losses for both the financial institution and the account holder
  3. Timing of Written Statement of Unauthorized Debit (WSUD)– The rule modification allows for greater flexibility in the timing of signing a WSUD. Specifically, it permits the WSUD to be signed and dated by the Receiver on or after the date the unauthorized debit entry is presented, even if the debit has not yet posted to the account. This change simplifies the process for receivers to dispute unauthorized debits and facilitates quicker resolution of such issues​
  4. RDFI Must Promptly Return Unauthorized Debit– This rule mandates that Receiving Depository Financial Institutions (RDFIs) must promptly return any unauthorized debit entries once they are identified. This requirement ensures that unauthorized debits are addressed quickly, minimizing the impact on the account holder and reducing the potential for further fraudulent activity. It emphasizes the responsibility of RDFIs to act swiftly in protecting their customers’ accounts from unauthorized transactions

For further details on these rule changes, visit NACHA’s official website on minor rules topics and risk management topics.

Preparing for Compliance

For originators and merchants, preparation is key to ensuring compliance with these new rules:

  • Review and Update Systems: Ensure that all payment processing systems are updated to align with the new data specifications and validation requirements.
  • Train Staff: Conduct comprehensive training sessions for relevant staff to familiarize them with the new rules and their implications.
  • Enhance Fraud Detection: Invest in advanced fraud detection and prevention technologies to meet the updated standards.
  • Audit Third-Party Relationships: Conduct thorough audits of third-party sender relationships to ensure compliance with the new risk management requirements.

By proactively addressing these changes, originators and merchants can mitigate risks, ensure compliance, and continue to facilitate secure and efficient ACH transactions.

June 4, 2024

About Adam Garrett

He has spent almost 20 years building successful merchant acquiring programs and is a proven sales leader who brings his expertise in team management, business development, and strategic planning to Viking Payments. He received his MBA from the University of Texas at Dallas, and his BS at Missouri State University.

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