L-1B does not impose a general U.S. recruitment test.
Support the standard that actually applies
Use genuine evidence of special or advanced knowledge and the proposed work. A market survey should not replace the employee’s knowledge record or invent a different legal threshold.
Use relevant project records, technical descriptions, training history and detailed employer explanations that establish the claimed knowledge. Distinguish a standard introductory manual from the expertise claimed, without assuming that documented or shared knowledge is automatically ineligible. Support the customer period with service contracts, purchase records, or access logs, and the employee period with payroll, tax, personnel, and internal assignment records. Identify which examples actually establish the material facts, and confirm with the employer how sensitive information should be redacted or summarized. Where a record has been lost with a superseded system, note that on the index rather than substituting a general statement that implies a contemporaneous document still exists. Use consistent terminology across the petition, organizational material, and support letters so a reviewer can understand the knowledge without guesswork.