The evidence pack should prove that the provider removed relevant obstacles, gave the customer the required information, supported the selected switching route, maintained continuity and security, applied the correct charge position, enabled retrieval, and completed erasure when required.
Make the record readable outside the migration team. Legal, procurement, security, engineering, support, and account teams should be able to see the contract clause, source article, customer communication, technical export proof, and closure evidence without reconstructing the switch from ticket comments.