Identity and status evidence sufficient for employment eligibility verification, including the admission record showing the relevant classification, together with the marriage documentation used for the dependant application. Keeping one clean copy set, and knowing which document does the work, saves argument with a hiring department later.
Anticipate an unfamiliar hiring department
Smaller employers may never have hired someone in this category and can ask for paperwork that is not required. Prepare a short, factual explanation the spouse can give, and ask counsel whether anything further should be obtained given the household's circumstances. Avoid the opposite error too: verification is a legal obligation for the employer, and the spouse must be able to satisfy it.
Keep one clean set and know which document does the work, since carrying more paperwork than necessary tends to invite questions rather than settle them. The admission record showing the classification is the item that matters for verification purposes; the marriage documentation supports the dependent application and is not what a hiring department is entitled to demand. Scan everything before the move, store the scans where both partners can reach them, and keep originals accessible rather than in freight, because the moment they are wanted is usually the moment they are least reachable.