Is there an official format for union advisory opinion letters in the O-1?

No. There is no official format required by USCIS for advisory opinion letters from unions or professional associations in the O-1 process. Each organization may use its own template.

This consultation is a specialized assessment of your credentials, issued by a recognized organization in your field. What matters is not the layout but the content: the letter must allow the immigration officer to understand the nature and significance of the recognition granted.

• Formal identification of the organization and a brief description of its standing in the industry.
• A clear assessment of your work and your recognition in the field.
• A professional tone and elements that reflect the authority of the issuing body.

Since details may vary case by case, it is worth checking the updated guidelines with USCIS and working with a qualified specialist when gathering your documentation.

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.