When this guide is useful
This fictional case concerns work completed in multiple stages.
The distinction that matters
The scenario shows how one final bill can conceal different projects, locations and readiness dates. Each phase needs a traceable cost and timing record.
A worked situation to investigate
A fictional landlord renovates two units while keeping other units occupied and receives a consolidated contractor invoice.
The example is illustrative. Begin with the underlying event and its source documents, then separate missing facts from disagreements about their treatment. Work through the checks below in the order that matches your file, rather than treating a completed checklist as a tax conclusion.
Build a traceable handoff
Identify the affected person, entity or property and the relevant period. Keep original evidence, corrections and the reviewer's written conclusion connected. If the facts change after review, preserve the earlier version and ask whether the change affects implementation.