VAMP Lessons From Acquirers, Risk Providers, Payments Experts

Visa is changing how it calculates fraud risk for merchants. The new Visa Account Updater and Merchant (VAMP) program combines fraud reports and disputes into a single risk calculation. Previously, merchants could look at their own chargeback ratios to gauge their exposure. Now, that view is incomplete.

The risk profile of an entire acquirer’s portfolio can now impact individual businesses. If a payment processor has a high concentration of risky merchants, Visa may flag the entire portfolio. This can trigger higher fees or stricter monitoring for even compliant merchants within that group. The shift moves risk assessment from the merchant level to the acquirer level.

This change draws on findings from Chargebacks911’s 2026 Chargeback Field Report. The report found that only 23% of merchants surveyed considered themselves “very” informed about card network rules. Another 16% said they had no knowledge of them at all. Most operators are flying blind on how network rules actually affect their bottom line.

For payment service providers and independent sales organizations, this is a structural change. You can no longer treat fraud and disputes as separate silos. Visa is looking at the aggregate risk of your entire book of business. A few high-risk merchants can drag down the risk score of your entire portfolio. This means your underwriting and monitoring processes must be tighter.

Merchants will feel the impact through their acquirers. If your processor’s portfolio gets flagged, your merchant may see sudden fee increases or account restrictions. They will not understand why. They will blame you. You need to be proactive. Monitor your acquirer’s portfolio health. Understand how Visa’s VAMP program works. Prepare your merchants for potential changes in fee structures or risk assessments.

The industry is moving toward more holistic risk management. Visa is not just looking at chargebacks. They are looking at fraud reports too. This broader view means more merchants will be affected by network-wide risk trends. Operators who ignore this shift will face higher costs and more friction with their acquirers.

The key takeaway is clear. You must integrate fraud and dispute data into your risk models. You cannot rely on isolated metrics anymore. You need to understand the acquirer’s portfolio risk. You need to communicate this to your merchants. You need to adjust your underwriting and monitoring accordingly. The era of siloed risk management is over.