Use accurate materials for the arrangement actually proposed in the case.
Keep alternatives identifiable
Retain relevant versions and make clear which terms remain under consideration. An unsigned alternative should not silently replace an agreed condition, nor should a selected offer be supported by another employer’s duties.
A Canadian citizen may apply for the classification at a US port of entry or preclearance location, presenting proof of citizenship, the employer's support letter, the degree and transcript and the applicable fee, or the employer may file Form I-129 in advance with USCIS. A signed offer letter from the employing entity with duties, salary, temporary period and title, plus written confirmation of the state licensing requirement and of who is responsible for obtaining it. A file for a multi-site assignment should open with a short written explanation of the arrangement: the employer's name, the fact that the therapist is its employee, the client facilities where services will be delivered, who supervises, and the expected duration of the engagement. A port-of-entry request compresses the entire showing into one encounter, so the citizenship proof, the employer's support letter, the credential records and any evaluation all have to travel together and be legible without explanation. Ask the new employer to describe supervision, worksite, and expected duration in their own words rather than copying language from the prior offer, because a copied letter describes a job that no longer exists.