An unfinished package or an offer letter does not authorize U.S. employment. The lawful start depends on the applicable authorization and its effective dates, including the admission or status process relevant to the individual. Have counsel review the route before agreeing to a work commencement.
Use two dates in employer communications
Describe the business target date separately from the confirmed authorized start. Explain what must happen between them and who will notify payroll and the manager when it does. Do not assume that calling duties orientation, volunteering, or remote onboarding makes them permissible before authorization.
If the evidence will not be ready, a clear revised date is more useful than a processing estimate that nobody can guarantee. Decide in advance what would cause you to move the date rather than push through it, and say so to the employer while the conversation is still an easy one. The threshold is usually a specific missing fact: an unconfirmed credential, an unresolved duty description, or an authorization whose effective date is unknown.
Describe the business target date and the confirmed authorized start as two separate dates in every communication, explain what must happen between them, and name who will tell payroll and the manager when it does. Do not assume that calling duties orientation, volunteering or remote onboarding makes them permissible before authorization exists. A clear revised date is more useful than an estimate nobody can guarantee.