The honest scope
What certified means, and what it does not.
Certified means every figure on the page ties to the source file's own totals, through checks written as plain code you can read and re-run, and that anything the file cannot prove is named on the page or held back rather than shipped as fact.
It does not mean the source file is true, that the vendor's export is complete, or that a business outcome is warranted. The skills' own documentation carries a "what this cannot prove" section for exactly this reason: a method that only lists its wins is the self-grading it exists to refuse. What you get is narrower and stronger than a promise: for a wrong figure to reach your reader, it would have to defeat every check in the net, and the net exists to catch it.