If an entity uses a third-party service provider (TPSP) that has been validated as PCI DSS compliant, is the entity's assessor required to go onsite to the TPSP's location and retest the PCI DSS requirements?
No. PCI SSC does not require that an entity’s assessor go onsite to the entity’s TPSP and retest PCI DSS requirements that have already been covered in the TPSP’s current …