IN THIS GUIDE · Identify who controls the specialist at an unaffiliated customer site
Start with the L-1B eligibility and application overview
Describe the knowledge and the employer’s service
Hypothetical example: a specialist will implement the employer’s internal system at a customer location. Identify the employee’s actual contribution, the knowledge required and what service the petitioning employer provides. Do not assume a customer address itself proves either eligibility or ineligibility.
Use the actual knowledge standard
Assess special knowledge of organizational products, services or related interests and international application, or advanced knowledge of processes and procedures. Knowledge need not universally be unique or secret. General technical experience or the customer’s need for staff is not a complete showing.
Examine the two offsite restrictions
For work primarily at an unaffiliated employer’s worksite, assess two distinct bars: the employee being controlled and supervised principally by that employer, or an arrangement essentially providing labor for hire rather than a product or service requiring knowledge specific to the petitioning employer. Establish both the actual supervision/control facts and the petitioner-specific knowledge connection; contract headings do not settle either issue.
Document the qualifying transfer foundation
Identify the actual foreign employer, required employment history, qualifying corporate relationship and business activity. Separate the customer from the qualifying group where they are different entities. Strong technical records do not replace these employment and organization requirements.
Complete the foreign-employment and new-office assessment
L-1B generally requires one continuous full-time 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. Brief U.S. trips need not interrupt continuity. The qualifying organization must provide regular, systematic, continuous goods or services in the United States and another country; registration alone is insufficient. For an ordinary L petition, the qualifying foreign work may be managerial, executive or specialized knowledge; the U.S. duties must meet the requested classification. New-office L-1A specifically requires managerial or executive foreign employment.
Explain the pilot’s actual stage and learned knowledge
For a primary placement at an unaffiliated employer, determine who controls and supervises the worker. Show how the employee learned and applied the process, including completed projects and decisions rather than only years of service. A knowledge held by two people in a firm of forty, documented in internal manuals, is specialized; a knowledge held by every analyst after a week's training is not. Explain the employee’s understanding of the actual configuration and operating methods, distinguishing ordinary vendor familiarity from the claimed company knowledge. The questions to put during contract negotiation are who sets the specialist's tasks, who supervises day to day, who carries responsibility for the deliverable, and what the client is actually buying. If the employee’s knowledge is genuinely of those things, the claim concerns the petitioner’s own equipment, techniques or procedures. A contract nursery running trials under the affiliate's protocols, reporting to the affiliate's research director, using the affiliate's proprietary system, can satisfy that. A persuasive account explains the difficulty of transferring the knowledge and the business consequence if it is unavailable, without claiming that nobody else can learn it.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.