Set up a documented method for dealing with complaints and appeals, make it known to interested parties, and cover: telling parties about the method; receipt; tracking; acknowledgement; initial assessment; investigation; response; communicating the decision; and closure. The method protects complainants' and appellants' confidentiality and keeps investigators objective; retain records of complaints or appeals received and how they were resolved (ISO 10002 offers guidance).
This control maps to 1 controls across 1 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 1 it maps to, and the evidence behind each claim, over MCP and REST.