What Reviewers Look For in the O-1 / EB-1 / NIW Recommendation & Expert Opinion Letter
This rubric reviews whether a letter gives a clear, evidence-based account of the candidate’s completed work, impact, and fit with the petition it supports. It also looks for checkable details, a clear explanation of the recommender’s expertise and relationship to the candidate, and plain language a non-specialist reader can follow.
What We Check
Whether each substantive paragraph does work an adjudicator can file under a named legal standard.
Whether the letter's case rests on work the candidate has already done.
The density of verifiable specifics.
Whether the letter establishes who the recommender is, how they came to know the candidate's work, and where they stand relative to the candidate.
Whether a generalist adjudicator with minutes per exhibit could follow the letter.
Mistakes We Flag
- Repeating legal language as praise
- Statements that the candidate meets a standard or uses legal phrases without candidate-specific facts are less useful than explaining concrete work and results.
- Relying on future potential
- Future plans can add context, but the letter should rest on completed achievements and demonstrated results rather than promises.
- Using broad praise instead of details
- Words such as “renowned” or “widely recognized,” and vague quantities such as “many,” do not show what happened or allow claims to be checked.
- Leaving the recommender’s connection unclear
- The letter should explain the recommender’s field and qualifications, how they learned about the candidate’s work, and whether they are a supervisor, collaborator, colleague, or independent expert.
- Writing only for specialists
- Technical terms, acronyms, and field-only measures need a plain-language explanation of what the work does and why its result matters.
References
Frequently Asked Questions
What kinds of letters does this rubric cover?
It covers one recommendation or expert-opinion letter supporting an O-1, EB-1A, or EB-2 National Interest Waiver petition. It reviews the letter on its own, not how it fits with other letters or exhibits.
How long should the letter be?
The working guidance is roughly 600 to 1,400 words, or about two to three pages. A current instruction from USCIS, the petition’s attorney, or the recommender’s institution takes priority.
What should the recommender explain about themselves?
They should establish their qualifications and field, explain how they know the candidate’s work, and describe their relationship or affiliation with the candidate. Their endorsement should stay within what they can credibly know.
Can the letter discuss future plans?
Yes, but future plans should extend evidence of completed work rather than replace it. The main case should be based on achievements and results the candidate has already demonstrated.
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