If the household plan depends on the principal's TN case moving forward, an unresolved credential gap can delay everyone's timeline, not just the applicant's. Keep dependents' school enrollment, housing, and travel plans provisional until the applicant's own records are confirmed complete and verifiable.
Keep the household timeline tied to the credential fix
It's tempting to plan the family's move around a target date set before the records issue was discovered. Reset expectations once the actual scope of missing documentation is known, since institutional replacement processes can take longer than expected. Communicate the revised timeline to the household early so schooling and housing decisions for dependents aren't made against a date that may need to shift.
There is a second point the household should hear at the same time. Dependents in this category hold TD status, which carries no work authorization, so a spouse intending to work needs an independent basis with its own preparation. A family facing an unresolved records question and an unauthorised second income is making two conditional plans at once, and it is better to know that before a lease is signed.
Set out which commitments can be undone and at what cost, and keep the reversible version of each until the institution has actually responded, since institutional response times are the one part of this timetable nobody involved can influence.