ESG figures come from the same suppliers, categories and orders as everything else. Estimates are labelled as estimates.
Scope 3 is estimated from spend, the standard first-pass method. It is labelled an estimate, not an audited figure.
Weight it in the evaluation, visible to all before the box closes.
It lives in the supplier's own portal.
Not whether there is a policy. What the number is, where it came from, and who checked it.