EB-1A Extraordinary Ability VISA Petitions & USCIS RFE Responses are some of the most powerful supporting documents for EB-1A visa applicants.
Expert opinion letters are often essential to helping immigration officers determine an individual’s status, the importance & reputation of their work, & the true impact of their contributions from an independent Subject Matter Expert (SME) perspective.
There are many providers that offer EB-1A expert opinion letter writing services but there is no easy way to know which provider is best for you and your EB-1A application or RFE response.
To HELP you make the right decision…
We have provided a comprehensive evaluation of the top expert opinion letter providers for EB-1A visa applications and RFE responses, focusing on the areas of visibility, service scope, & specialization.
Not sure what is an EB1A Visa?
Start with our EB1A Extraordinary Ability Green Card USA: Complete 2026 Guide to understand the process before choosing a service provider.
Top 5 EB-1A Expert Opinion Letter Services Providers
1. Document Evaluation
Document Evaluation assists applicants for EB-1A Visas & further evaluates by responding to Requests for Evidence (RFE), among other employment-related immigrant visa categories. The focus of the Service is to assist its clients in aligning their Professional Credentials with the Required Evidence by USCIS.
The Service employs experts that have been qualified from various professional disciplines to create letters that outline the Importance of the applicant’s work & its value to the profession and to society at large, organized in a format that is acceptable by the USCIS.
In addition, the Document Evaluation LLC provides assistance to applicants requiring immediate service through Quick or Accelerated processing.
Services of Document Evaluation LLC include:
- Expert Opinion Letters for EB-1A,1B, 1C, EB2 NIW cases
- Expert letters addressing specific USCIS concerns for responses to RFEs
- Expert opinion letters for H-1B, EB2, & EB3
- Cover letters, Translation pages, and more.
This type of Service has found its most significant use among Professionals who need to validate their complex immigration filings through Independent Experts.
EB-1A Expert Opinion Letter and RFEs Cost!
| Service Type | Days | Package | Price |
|---|---|---|---|
| EB-1A | 5 to 7 Days | Economy | $999 |
| EB-1A | 3 to 4 Days | Standard | $1299 |
| EB-1A | 1 to 3 Days | Express | $1699 |
| RFE Response (EB1A) | 5 to 7 Days | Economy | $1199 |
| RFE Response (EB1A) | 3 to 4 Days | Standard | $1399 |
| RFE Response (EB1A) | 1 to 3 Days | Express | $2199 |
Explore this service: Document Evaluation: Best Credential Evaluation Services USA
2. Global Credential Services (GCS)
Global Credential Services (GCS) is a widely recognized organization that specializes in providing accurate assessment reports and expert opinion letters for U.S. immigration applications. Applicants commonly use these expert opinion letters in EB-1A, EB-1B, EB-2 NIW, and O-1 visa processes.
GCS strives to create thoughtful & well-supported expert opinion letters that outline an individual applicant’s qualifications, contributions to the field, and professional status as viewed from the lens of an expert. Expert opinion letters prepared by GCS will contain expert opinions and assessments made by academic or industry professionals and will be prepared with an understanding of the appropriate structure for expert opinion letters used by USCIS.
Reasons to select GCS?
- Established history in creating expert opinion letters & evaluating credentials for immigration applications.
- Academic professionals with backgrounds relevant to the applicant’s field.
- Careful consideration of USCIS review criteria and thorough discussions of applicant’s experience and qualifications.
- Understanding of the RFE process and how to prepare and submit supplemental material when needed.
GCS is frequently chosen by applicants seeking a traditional format and structure for expert opinion letters based on academic qualifications.
Explore this service: Global Credential Evaluators
3. American Education & Translation Services (AET)
American Education and Translation Services (AET) is a well-known provider of expert opinion letters for EB-1A and other employment-based visas. Applicants frequently use AET’s services when they place a high level of importance on demonstrating equivalent experience and professional expertise.
AET expert opinion letters can be used to demonstrate:
- The equivalence of an applicant’s professional experience & their level of formal education.
- Why an applicant’s qualifications enable them to perform the duties of an unusual or extraordinary occupation.
- The theoretical and practical value of the applicant’s work.
Most applicants who need to demonstrate a very strong justification for a non-traditional educational or career trajectory choose this service.
Explore this service: American Education & Translation Services (AET)
4. ProfVal (Professional Evaluation Services)
ProfEval specializes in crafting expert opinion letters to support employment-based immigration, particularly EB-1A petitions for extraordinary ability. Their model for the development of expert opinion letters relies heavily on independent professional judgement. As a result, letters are only produced by evaluators who are well versed in USCIS guidelines for supporting claimants’ petitions.
The expert opinion letters provided by ProfEval typically describe:
- The Petitioner’s Original Contributions to Their Field
- The Petitioner’s Leadership and Recognition within Their Profession
- The Petitioner’s Contribution to Their Industry
- The Recognition Received for the Petitioner’s Contributions by Their Colleagues in the Profession
The Following are the Primary Features:
- Expert Authoring by Field Specific Professionals
- A Comprehensive Narrative Presenting the Connection of Each of the Claimant’s Accomplishments to the Relevant EB-1A Criteria
- Established Track Record of Developing Responses to RFEs.
Applicants seeking greater professional support than academic evaluations frequently turn to this service provider.
Explore this service: ProfVal (Professional Evaluation Services)
5. True Evaluators
True Evaluators is an expert evaluation service that provides expert opinion letters and evaluations for immigration cases filed with USCIS, including the EB-1A and EB-2 NIW categories. Their focus is on providing an applicant’s qualifications in a way that is easy for USCIS officers to understand & review.
Key strengths include:
- Well-organized & structured expert opinion letters
- Expertise with all of the major employment-based visa categories
- Preparation of RFE & appeal documentation
True Evaluators is often selected by applicants seeking expert documentation in a clear, concise manner.
Explore this service: True Evaluators
How to Choose the Best Expert Opinion Letter Service for EB-1A!
When choosing a provider of expert opinion letters for EB-1A or response to a Request for Evidence (RFE), it is advisable to evaluate the following characteristics:
- Experience with EB-1A’s or with extraordinary ability cases.
- Credibility & independence of the expert authors.
- Ability to communicate clearly about complex achievements.
- Familiarity with the USCIS language & the USCIS’s expectations for expert letters.
- Flexibility with regard to time frames if filing an urgent case, or if responding to an RFE.
Each provider has varied approaches & levels of specialization & depth in EB-1A, so it is important to choose the one that best fits your case.
In Closing!!
Additionally, expert opinion letters play a significant role in EB-1A visa applications as well as in responding to requests for additional information (RFEs) issued by the U.S. government. As a result, many organizations offer these EB-1A expert opinion letters.
However, all companies will have different approaches to creating the letter, varying time frames, and focuses.
When applying for an EB-1A visa and responding to an RFE, applicants can also identify clear trends by carefully observing how various organizations such as Global Credential Services, AET, ICS, ProfVal, True Evaluators, and Document Evaluation LLC formulate expert opinion letters.
This will allow you to determine what type of expert opinion letter may add the greatest value to your immigration application, & will give you the best opportunity to receive approval for your application.
Therefore, it is important to select an organization with expertise in immigration law, the national interest standard, and professional credibility. In addition, applicants should choose a service that best aligns with their case complexity, budget, and visa category. Higher probability of approval when supported by strong, compliant documentation.
Disclaimer:
This content is for informational purposes only and does not constitute legal advice. USCIS decisions vary based on individual case facts.
Frequently Asked Questions!
The Expert Opinion Letter is an independent opinion letter that confirms an individual’s credibility and qualifications in a specific field of expertise and how that will enhance the company and/or the applicant’s future opportunities.
No, an Expert Opinion Letter is not required, but it is highly recommended in complex situations to ensure that all necessary documentation is considered when reviewing an application to provide USCIS with the evidence of an applicant being an Individual with Extraordinary Ability through an Independent Third Party Expert's support.
USCIS issues an RFE when there are doubts about the strength of the evidence. When there is insufficient evidence to show a petition has met USCIS criteria for extraordinary ability, originality, and/or national recognition, an Independent Expert’s support is often recommended to assist USCIS in evaluating the petition.
An expert opinion letter must be signed and written by someone who has been recognized within the applicant's field and is considered an expert in that field.
Most Expert Opinion Letter providers process requests from start to finish within a few days; however, more urgent orders are generally available within 24 hours if needed by applicants due to USCIS deadlines & RFE timeframes.
Expert Opinion Letters are often used in RFE responses to directly address USCIS concerns regarding how significant the applicant's work is.
When choosing an expert opinion letter service, look for experience with EB-1A cases, credible expert authorship, USCIS compliance, customization, & support for RFE responses. Comparing multiple providers can help you select the best fit for your case.
Wendy
January 6, 2026“Great article on EB-1A expert opinion letter services! It’s very helpful to see a breakdown of the top providers and their specialties.