Do I need to submit client letters for an L-1B?

No. Client letters are not a required document in an L-1B visa petition. What supports the case is a demonstration of the professional’s specialized knowledge, and that evidence comes primarily from within the sponsoring company itself.

The core of the documentation is typically the sponsoring company’s letter, describing in detail the applicant’s duties, responsibilities, and why that knowledge is specific and relevant to the operation, along with supporting evidence that establishes the expertise. That is where the analysis is focused.

Client letters may be included as supporting material when they help illustrate applied knowledge in concrete projects. They complement the central petition documents, but do not replace them.

• Required: demonstrate specialized knowledge through the sponsoring company.
• Optional: client letters as reinforcement, if they add genuine context.
• Decisive: consistent documentation aligned with USCIS criteria.

Since each case is evaluated individually, it is worth checking the most current USCIS guidance and assembling the evidence package with a specialist before filing.

About the author

Victoria Harper

Editor-in-Chief

Meet the author

As a journalist and lead editor at Visto n’ Visa, Victoria helps ensure that immigration topics are covered in a clear, trustworthy, and easy-to-understand way. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.