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PCI requirements and who needs to follow them

Basis Theory

Third-Party Service Provider ( TPSP or "service provider") refers to an entity other than the Merchant, Acquirer, or Issuer involved in storing, processing, or transmitting card data. Taking a holistic approach to the Software Development Lifecycle (SDLC) security is key. Don't, however, let the term "merchants" fool you.

PCI DSS 88