August 2026 Summaries

Payment Account Reference (PAR) is a 29-character identifier tied to an underlying card account that remains consistent across card reissues and tokenized versions such as merchant-initiated network tokens and Apple Pay or Google Pay device tokens. As tokenization makes a single card appear as multiple unrelated payment credentials, PAR can help businesses recognize returning customers without relying solely on changing self-reported information or predictive identity models. Its potential uses include preventing promotion abuse and blocklist evasion through repeatedly regenerated wallet tokens, supporting card-linked loyalty and more accurate lifetime-value calculations across online and in-store purchases, and confirming that deposits and withdrawals use the same account for anti-money-laundering controls. Although PAR was introduced by EMVCo in 2016 to preserve account-level continuity amid tokenization, access varies by payment credential: it may be available during merchant-initiated token generation but is generally not shared by digital wallets or consistently provided before authorization for manually entered cards. The text presents Evervault’s PAR Lookups service as a way to resolve PARs for PANs, DPANs, and MPANs throughout the transaction process.

Cardholder verification uses issuer-side checks, often through a zero-value authorization, to compare submitted card details with bank records and return match, partial-match, or no-match results for address, CVV, name, and, with more limited support, phone and email. These signals differ from passive fraud indicators such as device, IP, velocity, and transaction history because they validate whether details are correct rather than detect unusual session behavior; consequently, they may not identify fraud involving fully compromised card data or account takeovers using unchanged information. CVV is presented as the strongest general verification signal because PCI DSS restrictions usually prevent merchants from retaining it, while AVS is useful but geographically inconsistent and should not be used alone, particularly outside the US, UK, and Canada. Name validation is most valuable when combined with KYC, especially for confirming payout-card ownership, while phone and email matches can be strong positive evidence when issuers support them. The recommended approach is to combine verification with behavioral signals, using verification at guest checkout, card onboarding, payout-card changes, medium-risk transaction step-ups, and 3DS decisions, while interpreting partial matches and unavailable results in context. The text also argues that processor-bundled verification is limited because it is generally tied to payment authorization and may not provide all signal types, whereas standalone services can apply checks earlier in the card lifecycle and across payment processors.

When building a fintech product, companies often consider external vendors for services such as payment processing, KYC, and fraud prevention, but may overlook the extensive offerings from card networks like Visa and Mastercard. These networks provide a wide range of API-based solutions beyond payment processing, including identity verification and fraud prevention, leveraging their vast transaction datasets for more accurate first-party data. Visa and Mastercard's APIs are integral to their strategy and offer high reliability, exemplified by VisaNet's 99.9999% uptime in 2025. Utilizing these services can streamline a company's tech stack, although awareness and long production timelines can be barriers. Solutions like Evervault can facilitate access to these APIs without direct integration, saving time and resources. Ultimately, the decision to use card network products should be based on specific business needs and timelines, but researching these options can provide long-term benefits to a company's payment infrastructure.