EB-1 Expert Opinion Letter: EB-1A, EB-1B & EB-1C

Why Petitioners Choose AAE Evaluations

Field-Matched Independent Experts
EB-1A, EB-1B & EB-1C Covered
Custom Research — No Templates
Draft Review Before Finalization
RFE Response Letters Available
Starting at $675 · Rush Available

EB-1 Expert Opinion Letter Cost

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What Is an EB-1 Expert Opinion Letter?

An EB-1 expert opinion letter is a formal written statement from a recognized, credentialed authority in the petitioner’s field that provides USCIS with an independent, evidence-based analysis of the petitioner’s qualifications under the applicable EB-1 subcategory criteria.

These letters are not character references or letters of recommendation. They serve a specific evidentiary function: to translate the petitioner’s professional achievements into language that directly maps to the USCIS legal standards for extraordinary ability, outstanding research, or executive and managerial qualification.

A strong EB-1 expert opinion letter does the following:

• Establishes the author’s own credentials and authority to evaluate the petitioner’s field
• Provides an objective analysis of the petitioner’s specific achievements and contributions
• Connects those achievements to the applicable EB-1 evidentiary criteria by name
• Places the petitioner’s work in the context of their field — demonstrating why it stands out at a national or international level
• Addresses the final merits determination for EB-1A: professional context for why the petitioner stands among a small percentage at the top of their field

What Is the EB-1 Category?

The EB-1 — formally the Employment-Based First Preference immigrant visa — is the first-preference employment-based immigrant category and includes EB-1A, EB-1B and EB-1C. It is among the most sought-after immigration pathways, offering a faster path to permanent residence. In the case of EB-1A, it does not require a job offer or employer sponsorship.

Each of the three subcategories has its own qualifying criteria and documentation requirements — and a different type of EB-1 expert opinion letter to support it.

EB-1 Expert Opinion Letter Services

EB-1A Expert Opinion Letter — Extraordinary Ability

The EB-1A category is for individuals with demonstrated extraordinary ability in the sciences, arts, education, business, or athletics. To qualify, a petitioner must show sustained national or international acclaim and that their achievements have been recognized in their field through extensive documentation.

Unlike EB-1B and EB-1C, EB-1A allows self-petitioning — no job offer or U.S. employer sponsorship is required. The petitioner must meet at least 3 of the 10 evidentiary criteria under 8 CFR §204.5(h)(3), and then pass a final merits determination showing they are among a small percentage at the top of their field.

An EB-1A expert opinion letter must go beyond summarizing the petitioner’s resume. It must objectively analyze achievements against the regulatory criteria — establishing not just that the petitioner is accomplished, but that they stand apart within their profession. The letter provides professional context for the petitioner’s achievements, recognition, contributions and standing when USCIS evaluates the totality of the evidence.

An EB-1A expert opinion letter prepared by AAE Evaluations addresses:

• Extraordinary ability standing and top-of-field assessment
• Original contributions and their significance within the field
• Publications, citations and scholarly or creative output
• Judging and peer review participation
• Field impact, leading or critical roles, and recognition
• Expert credentials and independence from the petitioner
• Criteria-specific analysis tied to 8 CFR §204.5(h)(3)
• Final merits and holistic review of the petitioner’s overall standing

See our dedicated EB-1A Expert Opinion Letter page →

EB-1B Expert Opinion Letter — Outstanding Professors & Researchers

The EB-1B category is for foreign nationals who have international recognition for outstanding achievements in a specific academic field. Applicants must have at least three years of experience in teaching or research and must be coming to the U.S. to pursue a tenured, tenure-track, or comparable research position.

Unlike EB-1A, EB-1B requires a U.S. employer to file the petition and provide a qualifying job offer. The evidentiary standard focuses specifically on academic and research contributions.

An EB-1B expert opinion letter is typically authored by a senior academic in the same or closely related discipline. It must credibly establish that the petitioner’s scholarly contributions are recognized as outstanding at an international level.

An EB-1B expert opinion letter prepared by AAE Evaluations addresses:

• Outstanding achievement and international recognition in the field
• Research contributions and their significance
• Publications, citations and their impact within the discipline
• University research and industry R&D standing
• Peer recognition, editorial board participation, and academic standing
• The petitioner’s position relative to others in their academic specialty

EB-1C Expert Opinion Letter — Multinational Managers & Executives

The EB-1C category is for managers and executives who have been employed outside the U.S. by a qualifying multinational organization for at least one of the preceding three years and who are coming to the U.S. to continue working in a managerial or executive capacity for the same organization, a parent, affiliate, or subsidiary.

An EB-1C expert opinion letter focuses on the petitioner’s managerial or executive functions — documenting the scope of their authority, the organizational structure they operate within, and the business impact of their leadership role. It must clearly distinguish true executive or managerial capacity from operational or administrative duties.

An EB-1C expert opinion letter prepared by AAE Evaluations addresses:

• Managerial or executive capacity and the nature of the role
• Organizational authority and reporting structure
• Business leadership and decision-making scope
• The qualifying multinational organizational relationship
• Distinction between executive/managerial and operational functions

See our EB-1C Expert Opinion Letter page → | EB-1C Guide and RFE Strategy →

What the Expert Opinion Letter Covers

Expert Credentials & Independence

Each letter author is a vetted, credentialed independent expert — a qualified professor, researcher, or senior industry professional matched to the petitioner’s field. The letter establishes the expert’s credentials and their independence from the petitioner before providing any analysis.

Evidence Review

The expert reviews the full record submitted: publications, awards, roles, recognitions, citations, organizational materials, and relevant petition documents.

Criteria-Specific Analysis

The letter maps the petitioner’s documented record to the applicable EB-1 regulatory criteria by name — providing specific, evidence-anchored arguments tied to the legal standard.

Professional and Field Significance

The letter places the petitioner’s achievements in the broader context of their field — providing professional analysis of why those achievements are significant, recognized, and notable relative to others in the discipline.

EB-1A Evidentiary Criteria — What Your Letters Must Address

For EB-1A extraordinary ability petitions, USCIS requires evidence of at least 3 of the following 10 criteria under 8 CFR §204.5(h)(3):

1. Receipt of lesser nationally or internationally recognized prizes or awards for excellence in the field
2. Membership in associations requiring outstanding achievement of their members
3. Published material about the alien in professional or major trade publications or major media
4. Participation as a judge of the work of others, either individually or on a panel
5. Original scientific, scholarly, artistic, athletic, or business-related contributions of major significance
6. Authorship of scholarly articles in professional or major trade publications or other major media
7. Display of the alien’s work at artistic exhibitions or showcases
8. Performance of a leading or critical role for organizations or establishments with a distinguished reputation
9. Command of a high salary or remuneration for services in relation to others in the field
10. Commercial successes in the performing arts

An EB-1A expert opinion letter from AAE Evaluations is structured to speak directly to each criterion the petitioner is relying on — providing a substantive, evidence-anchored analysis. Generic or vague letters that simply praise the petitioner without connecting achievements to specific criteria are a leading cause of EB-1A RFEs.

EB-1A Expert Opinion Letters and Final Merits Review

Satisfying three or more EB-1A criteria is only the first stage. USCIS then considers the totality of the evidence to determine whether the petitioner has sustained national or international acclaim and is among a small percentage at the top of their field.

An expert opinion letter can provide professional context for the petitioner’s achievements, recognition, contributions and standing when USCIS evaluates the totality of the evidence. The letter frames the combined weight of the petitioner’s record in terms a USCIS adjudicator can evaluate against the regulatory standard.

Why Use a Field-Matched Independent Expert?

USCIS evaluates both what an expert opinion letter says and who wrote it. Independent experts — those with no prior working or personal relationship with the petitioner — provide the most objective, credible analysis available. An independent expert can speak to the significance of the petitioner’s work purely on its professional merits, without any appearance of personal advocacy.

For EB-1A: The majority of letters should come from independent experts with no prior working or personal relationship with the petitioner.

For EB-1B: Letters from senior academics in the same or adjacent discipline, with at least some from institutions other than where the petitioner has studied or worked.

For EB-1C: Letters from senior executives, industry analysts, or business authorities who can speak credibly to the organizational structure and scope of the petitioner’s leadership.

Expert profiles at AAE Evaluations include:

• Tenured university professors and senior research scientists
• C-suite executives and board-level industry leaders
• Government policy advisors and senior officials in relevant agencies
• Recognized industry analysts and published authorities in the petitioner’s specialty
• Founders or principals of institutions with distinguished reputations in relevant fields

AAE Evaluations works exclusively with vetted, credentialed independent experts across a wide range of academic and professional disciplines.

EB-1 Expert Opinion Letter for RFE Responses

Receiving an RFE on your EB-1 petition does not mean your case is lost — it means USCIS needs more specific evidence to complete its evaluation. A targeted EB-1 expert opinion letter for an RFE is one of the most effective tools for addressing the deficiencies USCIS has identified.

EB-1A RFE

Common EB-1A RFE issues that expert letters can address:

• Extraordinary ability and top-of-field standing
• Whether specific criteria have been genuinely satisfied
• Original contributions and their significance to the field
• The final merits determination — overall standing relative to peers

EB-1B RFE

Common EB-1B RFE issues that expert letters can address:

• Whether the petitioner’s research is recognized as outstanding at an international level
• Citations, publications and their standing in the discipline
• Whether the offered position qualifies as tenure-track or comparable

EB-1C RFE

Common EB-1C RFE issues that expert letters can address:

• Whether the petitioner’s role constitutes true executive or managerial capacity
• Organizational structure and authority
• Distinction between managerial/executive and operational or supervisory duties

RFE letters are tailored to the specific issues identified in the notice. An RFE letter must directly engage with the specific language and concerns stated in the RFE notice — addressing each point by name with fresh analysis. It must not simply reuse the original letter.

Also see: EB-2 NIW Expert Opinion Letters →

How Many EB-1 Expert Opinion Letters Do You Need?

There is no fixed USCIS-required number. The number of expert letters used in a petition varies based on the category, the evidence available, and the petition strategy. General guidance:

• EB-1A initial petition — The majority of successful petitions include multiple independent expert letters addressing the criteria being relied upon and the petitioner’s overall standing. Letters should collectively cover each criterion and speak to the final merits determination.
• EB-1B initial petition — Letters typically come from senior academics in the same discipline, with a meaningful share from independent sources outside institutions where the petitioner has studied or worked.
• EB-1C initial petition — Letters typically come from business authorities and senior professionals who can objectively assess the petitioner’s executive or managerial role and organizational impact.
• RFE response — Letters specifically targeting the issues USCIS has raised. Quality, specificity, and direct responsiveness to the RFE language are more important than volume.

Expert Opinion Letter vs. Recommendation Letter

These are two distinct document types that serve different evidentiary functions in an EB-1 petition.

A strong EB-1A petition typically includes both types.

See EB-1A Recommendation Letters →

How It Works

1. Submit Your Documents

Provide your CV, publications, awards, research output, employment information, and relevant petition materials. If you have received an RFE, include the full notice.

2. Expert Matching

We identify a field-matched independent expert whose disciplinary background and credentials align precisely with your field and the criteria you are relying on.

3. Letter Preparation

A custom EB-1 expert opinion letter is drafted around your specific case and applicable EB-1 category — addressing each relevant criterion with specific, evidence-anchored arguments.

4. Draft Review

You receive the draft letter for review before the final signed document is issued. This is your opportunity to review the content and confirm accuracy before finalization.

5. Final Delivery

The expert signs the final letter on official letterhead. Each letter undergoes a final check before delivery as a signed PDF ready for filing.

Start Your Application →

EB-1 Expert Opinion Letter Sample

Interested in reviewing the format, depth and level of case-specific analysis before ordering? Request an anonymized sample letter to see how an EB-1 expert opinion letter is structured and what it covers.

Request a Sample →

Documents Required for an EB-1 Expert Opinion Letter

To prepare your EB-1 expert opinion letter, our team typically requires:

1. Latest CV or resume
2. All education credentials — degrees, diplomas, certificates — in PDF format. See our Academic Evaluation service → if your foreign credentials need evaluation
3. Work experience letters documenting your professional history — see our Work Experience Evaluation service →
4. Evidence of awards, prizes, or recognitions received
5. Publications, patents, citation records, or research output documentation
6. Evidence of judging, peer review, or editorial board participation
7. Evidence of media coverage, press mentions, or published material about you
8. Documentation of high salary or remuneration relative to peers (for EB-1A salary criterion)
9. Membership documentation for professional associations with outstanding achievement requirements
10. A personal statement describing your proposed endeavor in the U.S. (EB-1A)
11. RFE copy if you have received one from USCIS
12. Any documents already submitted or being submitted to USCIS

Additional materials may be requested depending on your EB-1 subcategory and case complexity.

Why Choose AAE Evaluations for Your EB-1 Expert Opinion Letter?

• All Three EB-1 Subcategories Covered — We prepare EB-1 expert opinion letters for EB-1A extraordinary ability, EB-1B outstanding professors and researchers, and EB-1C multinational managers and executives.
• Prepared for USCIS Petition Use — Every letter is structured to directly address the applicable USCIS adjudication criteria and provide independent professional analysis supporting the petition’s evidence.
• Field-Matched Independent Expert Network — We work with vetted, credentialed academics, senior researchers, and industry executives who provide independent, authoritative assessments in the petitioner’s specific discipline.
• Custom Research — No Templates — Every EB-1 expert opinion letter is individually researched and written for your specific background and case.
• Draft Review Before Finalization — You review the draft before the final signed letter is issued.
• RFE Response Expertise — We read every RFE carefully and build letters that directly address the specific concerns USCIS has stated.
• Competitive Pricing — Starting at $675, with standard 6-business-day turnaround and rush options available.
• Full-Service Immigration Documentation — Pair your EB-1 expert opinion letter with our education evaluations, work experience evaluations, and EB-1A recommendation letters for a complete evidentiary package.

Related Services

• EB-1A Expert Opinion Letter — Dedicated service page for EB-1A extraordinary ability petitions
• EB-1C Expert Opinion Letter — Dedicated service page for EB-1C multinational executive petitions
• EB-1A Recommendation Letters — Peer and collaborator support letters that complement the EB-1A expert opinion letter package
• EB-2 NIW Expert Opinion Letters — For National Interest Waiver petitions under the Dhanasar framework
• EB-2 NIW Recommendation Letters — Supporting letters for EB-2 NIW petitions
• H-1B Expert Opinion Letters — Specialty occupation and degree equivalency letters
• O-1 Expert and Advisory Letters — Extraordinary ability documentation for O-1A and O-1B petitions
• L-1A and L-1B Expert Opinion Letters — Managerial, executive, and specialized knowledge letters
• Academic & Education Evaluation — Foreign credential evaluations for immigration purposes
• Work Experience Evaluations — Equivalent degree determinations based on professional experience
• Expert Opinion Letter Hub — Overview of all expert opinion letter services offered by AAE Evaluations
• EB-1C Guide & RFE Strategy — Detailed article on EB-1C requirements and RFE strategy

Frequently Asked Questions

What is an EB-1 expert opinion letter?

An EB-1 expert opinion letter is a formal document written by a recognized, credentialed authority in the petitioner’s field that provides USCIS with an independent, evidence-based analysis of the petitioner’s qualifications under the EB-1 visa criteria — whether for extraordinary ability (EB-1A), outstanding researcher (EB-1B), or multinational executive (EB-1C).

Is an expert opinion letter required for EB-1?

An EB-1 expert opinion letter is not legally mandated, but it is strongly recommended and included in the vast majority of successful EB-1 petitions. It provides independent, third-party corroboration of achievements and directly connects the petitioner’s record to the USCIS adjudication criteria — significantly strengthening the petition and reducing the risk of an RFE.

What is an EB-1A expert opinion letter?

An EB-1A expert opinion letter is a specialized letter supporting an extraordinary ability petition. It must objectively analyze the petitioner’s achievements against the 10 evidentiary criteria under 8 CFR §204.5(h)(3), establish that the petitioner meets at least 3 of those criteria, and provide professional context for the final merits determination — that the petitioner stands among a small percentage at the top of their field.

How is an EB-1 expert opinion letter different from an EB-1A recommendation letter?

An EB-1 expert opinion letter provides an independent, analytical assessment that directly maps the petitioner’s achievements to the USCIS regulatory criteria. An EB-1A recommendation letter typically comes from someone who has worked with or collaborated with the petitioner and speaks more personally to their contributions and standing. Both types are valuable — a strong EB-1A petition typically includes both.

How many expert opinion letters are needed for EB-1A?

There is no fixed USCIS-required number. The number varies based on the petitioner’s record and petition strategy. Letters should collectively address all criteria being relied upon and speak to the petitioner’s overall standing in the field for the final merits determination.

Can an EB-1 expert opinion letter help with an RFE?

Yes. A well-crafted EB-1 expert opinion letter for an RFE directly addresses the specific concerns USCIS has raised — it is one of the most effective evidentiary tools in an RFE response. It must be specifically tailored to respond to the RFE’s language and must not simply reuse the original letter.

Who can write an EB-1 expert opinion letter?

Qualified authors include tenured university professors, senior research scientists, C-suite executives, government policy advisors, and recognized industry authorities with documented credentials in the petitioner’s field. For EB-1A petitions, independent experts — those with no prior professional or personal relationship with the petitioner — carry the greatest weight with USCIS.

What is the difference between EB-1A and EB-2 NIW?

Both EB-1A and EB-2 NIW allow self-petitioning without a job offer. However, EB-1A sets a higher evidentiary bar — it requires proof of being among a small percentage at the very top of your field with sustained national or international acclaim. EB-2 NIW focuses on whether your work serves the U.S. national interest and whether the benefits of waiving the labor certification requirement outweigh the national interest in the labor market test. Many petitioners who do not qualify for EB-1A are strong candidates for EB-2 NIW.

Does AAE Evaluations prepare EB-1 letters for all three subcategories?

Yes. AAE Evaluations prepares EB-1 expert opinion letters for EB-1A extraordinary ability, EB-1B outstanding professors and researchers, and EB-1C multinational managers and executives. Each letter type is tailored to the specific adjudication criteria of that subcategory.

How long does it take to get an EB-1 expert opinion letter?

Standard turnaround is 6 business days. Rush options are available. Contact us at Contact@aaeevaluations.com or (+1) 813-816-3969 for current availability and rush pricing.

Do you provide a draft for review before the final letter is issued?

Yes. You receive the draft letter for review before the final signed document is issued, allowing you to confirm accuracy and completeness before finalization.