Start with the actual approval
Link the estimate or agreed scope, actual authorization record, dated change requests, technician notes and relevant repair-order entries. Identify who approved what using the available record. Do not reconstruct permission from memory or invent missing notes.
Compare scope with the record
The shop's designated reviewer checks whether the recorded work and proposed charges align with documented approval. Missing or ambiguous evidence goes back to the responsible person for clarification rather than becoming an assumed authorization.
Keep open questions visible
Add an authorization-review step before invoice approval. Show the unresolved question, the person responsible for checking it and the next action. A completed task and a completed authorization review are different states.
Define who may act
The shop identifies who requests customer approval and who may approve billing. FaultZero helps organize that handoff; it does not establish legal entitlement to payment, certify compliance or authorize charges on the shop's behalf.