Compare the actual passport, applicable petition and visa documents, and relevant admission or status records. Identify the employer, category, names and dates accurately.
Flag inconsistencies without making assumptions
Provide the original context of each record and explain recent travel or changes. A document checklist helps identify issues, but it does not replace assessment of what a discrepancy means or how it should be addressed. Set the scope of the comparison by asking what a mismatch would actually change.
That keeps the exercise from expanding into every piece of paper the applicant owns. The passport identity page, the petition and its approval, the visa where one applies, and the admission or status record are in scope, because a discrepancy in any of them changes what the applicant may do or how long they may remain. A supporting exhibit filed long ago generally is not.
Do the comparison in one sitting with the originals or clear scans side by side, and write down what was checked and on what date, because the next reviewer's first question will be whether an item was examined or assumed. Where the applicant has travelled recently, obtain the most recent admission record rather than working from a copy taken before the last trip; that one stale document accounts for a large share of avoidable confusion.