Contract Version Comparison Checklist: What to Review Before Approval

Contract review often goes wrong before the first clause is read. Make sure the older file is really the baseline and the newer file is really the version under review. If a counterparty sends both a redline and a clean copy, compare the clean copy against your last approved version as an independent check.

Do not compare a draft against a file that already includes accepted changes unless that is the exact question you need to answer. A wrong baseline can hide important edits.

Start with fields where small edits have large consequences: parties, effective date, term, renewal, payment due date, invoice procedure, service levels, liability limits, termination rights, governing law, confidentiality period, and data processing obligations.

A diff may show that only one word changed, but one word can change responsibility. For example, "may terminate" and "must terminate" are very different. Treat modal verbs, deadlines, numbers, and exceptions as high-risk tokens.

Contracts often refer to exhibits, statements of work, order forms, schedules, or external policies. If a clause says "as described in Exhibit B," confirm that Exhibit B still exists and still says what the main agreement expects. Renumbered sections can create hidden problems.

Comparison output is strongest on visible text. It may not tell you that a referenced attachment was replaced outside the main file. Review the package, not only the document body.

Before approval, summarize the material changes in normal language. A good note says what changed and why it is acceptable: "Liability cap increased from fees paid in 6 months to fees paid in 12 months; approved by finance."

This final note helps future reviewers trust the file history. It also makes it easier to answer why a specific draft became the signed version.