IN THIS GUIDE · Explain the specialist’s knowledge and assignment after the transaction
Start with the L-1B eligibility and application overview
Describe the knowledge actually held by the employee
Hypothetical example: a buyer acquires a product line and proposes transferring an employee familiar with its deployment process. Explain special knowledge of the organization’s products, services or interests and international application, or advanced knowledge of its processes and procedures. The transaction’s value does not itself establish that knowledge.
Use accurate training and history
Provide the employee’s genuine experience and work examples. L-1B does not universally require unique, secret or proprietary knowledge or a general U.S. recruitment test. Assess the relevant qualifying foreign employment, generally one continuous year within the preceding three-year period under the applicable timeline, without assuming the sale resolves every historical question.
Establish the resulting organizations and operations
Document actual qualifying ownership or control relationships and doing business. A purchase agreement can establish transaction facts without automatically proving each classification condition. For a new office, assess sufficient premises and financial ability to pay the employee and begin doing business alongside the specialized-knowledge case.
Review any changed customer-site assignment
For work primarily at an unaffiliated employer’s site, the bars are 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. Assess the actual control, supervision and petitioner-specific knowledge connection. Old supervision terms should not be assumed to remain true after the acquisition.
Bridge the sale date with genuine employment records
Keep the pre-sale payroll and travel chronology, the transaction documents and the resulting employment arrangement in distinct parts of the file. Generally establish a continuous full-time foreign year during the relevant preceding three years; exclude U.S. days, although brief visits need not break continuity. Explain whether the foreign duties were managerial, executive or specialized knowledge and why the resulting U.S. work qualifies for L-1B. Only the new-office L-1A alternative specifically demands a managerial or executive foreign year. Use real activity records to establish regular, systematic, continuous business in the United States and another country after the transaction. A sale or new registration does not alone establish the operating history. If the relevant U.S. organization has done business for less than a year, show sufficient premises and finances to pay the employee and begin business; initial new-office approval is limited to a year.
Specialized knowledge means the company's, not the industry's
Specialised knowledge means knowledge of the company's own product, service, research, equipment, techniques, management or procedures, or an advanced level of expertise in its processes. Knowledge that exists only in one person's head is hard to prove; knowledge documented in internal manuals, training records, project close-out reports and certifications is easier. If the affiliate will place the programmer at a customer's plant, the petition must show that the petitioner still controls the work and that the assignment is not simply supplying labour to the client. The company's validation master plan, its cleaning-validation protocols, its batch-release procedures and their revision histories show what the specialized knowledge consists of and who created it. Familiarity with a floor plan or ordinary warehouse experience is different from evidence of special or advanced organizational knowledge. The separate labour-for-hire restriction requires distinguishing staff supply from work connected with the petitioner’s product or service needing specialized knowledge specific to that petitioner.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.