Have the actual authorization and change process assessed before relying on the new assignment. A future filing or internal approval is not current permission.
Keep the start decision evidence-based
Record the proposed date accurately without implying the employer can confer immigration authority.
Preparation should begin as soon as the turnaround schedule is confirmed, since port-of-entry processing depends on complete evidence being ready on the day of travel, not assembled after arrival. Start well before the expiration date rather than in the final weeks, since gathering updated evidence and confirming the role still matches the original basis takes time. The first review should produce a dated sequence of evidence collection, travel or petition steps, and a lawful contingency for delay.; each conclusion should point to the record that settles it. Turn the target start date into a sequence of dependencies: settled duties, completed employer letter, credential availability, procedure choice, and travel date. What goes wrong at this point is a calendar error with real cost: non-refundable flights and a moving date are booked around the start date in the offer, as though that date and the date work may lawfully begin were the same thing.