What does SAQ D represent?

SAQ D stands for "Self-Assessment Questionnaire D," which is designated for all other merchants that are eligible for self-assessment but do not fit into specific categories outlined in the other SAQs (Self-Assessment Questionnaires). This group typically includes larger merchants and those with more complex environments.

These merchants are responsible for ensuring they meet all PCI DSS requirements, as they handle sensitive payment card data in a way that requires a thorough self-assessment of their security practices. The broad applicability of SAQ D makes it essential for a wide range of organizations that may not be covered by the more narrowly defined SAQs, which cater to specific operational configurations or transaction volumes.

In contrast, the other options specify categories with specific transaction thresholds or types of solutions that do not encompass the full range of eligible merchants, thus differentiating SAQ D as a more inclusive designation for compliance assessment.