Do I need an advisory opinion for O-1A?

In general, yes: an O-1A petition typically requires an advisory opinion (also called a consultation letter). It is issued by a union, association, or recognized organization in your field and serves as a peer assessment evaluating whether your profile and achievements support the classification.

This letter helps the adjudicating authority understand the merit of your work from the perspective of those who know the field. A few practical points:

• Not every field has a designated entity authorized to issue this opinion.
• When no designated body exists, the format of the request may vary.
• It is worth confirming which entity covers your specialty and what it requires.

Because the details differ depending on the field, the best approach is to check the current guidance from the official source (USCIS) or consult a specialist before gathering your documentation, to avoid errors and unsupported submissions.

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.