Your Hub for Payment Account Reference (PAR)
Blog post from Basis Theory
Payment Account Reference (PAR) is a globally unique identifier developed by EMVCo and card schemes to connect different representations of a card account, including PANs, network tokens, PSP tokens, DPANs, and FPANs, without being intended to track consumers. It can help merchants and fintechs recognize the same payment account across in-store, online, and digital-wallet transactions, supporting more complete purchase histories, cross-channel loyalty programs, personalized offers, reporting, and fraud prevention. PAR may identify account-linking fraud and promotion abuse by revealing when one payment account is associated with multiple user profiles, especially when combined with device, IP, or other risk signals. Accessing PAR through card-network APIs generally requires PCI Level 1 compliance or a third-party tokenization platform that securely collects and stores PAN data independently of payment service providers. Basis Theory presents its tokenization platform, API tools, Reactors, proxies, and Terraform example as a way for payment teams to access PAR while maintaining PCI compliance and control over payment data.
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