IN THIS GUIDE · Explain supervision and specialized work at a client location
Start with the L-1B eligibility and application overview
Map who assigns and evaluates the work
Hypothetical example: an employee would configure the petitioning company’s system at a customer’s site. Identify who assigns technical tasks, supervises performance and changes priorities. Describe actual practice alongside contract terms; a company manager named on paper does not settle who principally controls the employee. Obtain the statement of work, escalation rules, timesheet process and performance-review practice. Together, those records show who directs the assignment when the customer’s daily requests differ from the petitioner’s plan.
Explain the product or service being provided
Identify the deliverable and why specialized knowledge specific to the petitioning employer is necessary. An arrangement essentially supplying labour for hire to an unaffiliated employer raises a separate restriction. A general statement that the client needs an experienced worker does not explain the employer-specific knowledge requirement. Link the employee’s knowledge to named features, implementation choices or methods that the petitioner delivers. The decision is not whether the client values the worker, but whether the work calls for knowledge that is special or advanced within the organization.
Assess both third-party restrictions
Where the employee will be stationed primarily at an unaffiliated employer’s worksite, L eligibility is barred if that employer principally controls and supervises the employee, or if the placement is essentially labour for hire rather than the qualifying product or service arrangement. Have both issues assessed; satisfying one does not answer the other. Read the customer contract and daily operating evidence together. A contract label cannot cure a relationship in which the customer actually directs the worker, and a genuine service arrangement needs evidence beyond a conclusion in the petition.
Review changes to location or assignment
Provide updated facts when a client, scope or supervision arrangement changes. The company relationship, foreign employment and knowledge requirements still apply independently. Do not assume approval of an earlier assignment authorizes every later client placement or that all client-site work is prohibited. The worker must have completed one qualifying year abroad during the three years immediately before the requested L-1 event. L-1B time is generally subject to a five-year maximum. Confirm that the knowledge, organization and proposed duties still align when an assignment changes.
Use the applicable special or advanced knowledge standard
The relevant standard concerns special knowledge of company products and international application or advanced knowledge of company processes and procedures. Identify appropriate evidence of regular, systematic and continuous provision of goods or services. Training files, technical change records, internal manuals and examples of decisions can show why the knowledge matters to the proposed work. The record may compare internal training stages, identify complex problem-solving, and connect prior projects to the proposed work. The record should identify the work the person will do after transfer and why ordinary familiarity with the product is not the whole explanation.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.