Can international clients write reference letters for the O-1?

Yes, international clients can write reference letters for the O-1. What matters in this process is not the nationality or country of the person signing, but rather their credibility, professional recognition, and authority in their field.

Reference letters help demonstrate your achievements and the relevance of your work. A letter signed by an internationally recognized expert is welcome, provided it contains concrete, substantiated content rather than generic praise.

Strong letters typically include:

• Specific details about your accomplishments and projects.
• Context about who is signing and why their opinion carries weight in the field.
• Examples of how your work stands out on the global stage.

Including references from professionals based in the United States can strengthen your petition package, but it is not required. If you are unsure how to assemble this body of evidence, it is worth organizing your documentation and checking the latest guidance from USCIS or consulting a specialist.

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.