IN THIS GUIDE · Identify who actually supervises a specialist at an unaffiliated site
Start with the L-1B eligibility and application overview
Identify actual direction and evaluation
Hypothetical example: the petitioner pays the employee, but the customer sets daily assignments and evaluates performance. Explain the genuine arrangement. Payroll alone does not answer principal control and supervision. Use the agreement, project plan and actual reporting structure to identify who assigns tasks, sets hours, evaluates performance and can remove the employee. A customer may coordinate a project without becoming the controlling employer, but the record must describe the real division of responsibility.
Apply both offsite limitations
For work principally at an unaffiliated site, assess principal control and supervision and the separate labor-for-hire limitation versus placement connected with the petitioner’s product or service requiring specialized knowledge. Satisfying one issue does not automatically resolve the other. Trace each offsite task to the petitioner's product, service or specialized implementation. The parties must decide whether the specialist is deploying the petitioner's offering or filling a position the customer normally staffs. A purchase order alone rarely explains that operational distinction.
Preserve the knowledge standard
The U.S. role needs special knowledge of organizational products, services or interests and international application, or advanced knowledge of processes and procedures. Neither an offsite contract nor a general technical skill establishes that alone; uniqueness and secrecy are not universal requirements. Describe how the knowledge was acquired, how it is used, and why ordinary training or public experience does not fully replace it. Manuals, internal training histories, release records and comparison declarations may be useful when they accurately reflect the work. Broad claims that someone is indispensable invite an avoidable credibility problem.
Keep history and group evidence complete
Generally one continuous qualifying foreign year in the relevant preceding three years, a qualifying corporate relationship and continuing international business are required. The general foreign capacity may differ from the U.S. role. New-office L-1B has additional premises and financial-ability requirements. Build the corporate and personal chronology separately. Related-company evidence establishes the organizational setting, while payroll, job records and travel history establish the qualifying foreign year. For a new office, financial evidence should address the ability to begin doing business and to compensate the proposed worker.
Complete the foreign-employment and new-office assessment
L-1B generally requires one continuous qualifying year of foreign employment within the relevant preceding three-year period, along with qualifying organizations that meet the doing-business requirements. Assess actual dates and locations; U.S. days do not count toward the foreign year. For a U.S. organization doing business for less than one year, the L-1B new-office evidence includes sufficient premises and financial ability to pay the employee and begin doing business. Initial new-office approval is limited to at most one year. Hypothetical example: a Corman Park industrial-washer calibrator is sent to configure the petitioner's proprietary sanitation controls at a U.S. food-packaging customer. She must decide whether to accept a later roster that assigns her general maintenance under the customer's foreman. The service agreement, control-system training record and revised supervision plan determine whether the placement remains supportable.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.
- USCIS — L classification documentation and evidence
- Department of State — 9 FAM 402.12
- 8 USC 1184 — specialized knowledge definition
- USCIS — employment authorization for certain spouses
- ICE — nonimmigrant classes that may study
- USCIS — fee schedule
- Official regulatory L foreign-capacity and new-office standards