Map systems and responsibilities
Identify payment flows, connected systems, service providers, administrative access and technologies that can affect the security of account data.
Operate the controls
Maintain secure configurations, vulnerability remediation, strong authentication, logging, change control and incident procedures. Evidence should show the control working across the assessment period.
Manage third parties
Record the services they provide, shared responsibilities, compliance evidence and incident notification routes. A certificate does not explain your operational dependency.
Prepare evidence by owner
For every requirement, name the control owner, evidence source, review frequency and remediation path. Remove duplicate screenshots and preserve authoritative records.
Scope is the first controlDocument where account data enters, moves, is stored and leaves. Validate segmentation rather than assuming it reduces scope.