What evidence should an intercompany reconciliation leave behind?

Detailed Explanation

Enough for someone who was not there to reconstruct it: the balances compared, the source of each, the differences identified, the explanation for each difference, the corrective entry made, and who approved it. Dates and identities matter as much as amounts. A reconciliation with no preparer, no reviewer and no timestamp is difficult to rely on regardless of whether the numbers were right. Audit-ready means this record exists as a by-product of doing the work, rather than being assembled from memory when the request arrives.