Letters in EB-2 NIW can provide context for achievements, importance, positioning, and national interest. Their weight depends on direct knowledge, specific examples, and corroboration by other evidence—not on a fixed number or template.
Recommendation letters can help in EB-2 NIW when they explain concrete facts: what the person accomplished, how the author knows that work, why the achievement matters, and how it relates to the endeavor or professional project to be pursued in the United States. They do not carry automatic weight, do not replace documents, and no number or letter template guarantees eligibility.
USCIS evaluates the relevance, probative value, and credibility of evidence both individually and as a whole. The useful question, then, is not “how many letters do I need?” but “what can each letter actually establish, and what evidence confirms its statements?”
There is no magic number of letters
The USCIS Policy Manual offers examples of evidence that may show a person is well positioned to advance a proposed endeavor. The guidance itself states that the list is not a checklist and that no type of evidence is individually required or sufficient.
The official sources reviewed do not set a minimum or ideal number of letters for an NIW. They also do not establish a required division among professors, supervisors, clients, outside experts, or public officials.
Quantity may add volume without adding information. Five letters that repeat the same praise may clarify less than two letters based on different experiences and tied to verifiable facts. The reverse may also occur: a complex endeavor may require more than one perspective. The decision depends on what must be shown, not on a numeric target.
What makes a letter useful to USCIS
In analyzing the second Matter of Dhanasar prong—whether the person is well positioned to advance the proposed endeavor—USCIS says letters can be persuasive when they include four elements:
the author has expertise relevant to the field;
the author has direct knowledge of the person's achievements;
the author describes those achievements and gives specific examples of how they show good positioning; and
the statements are supported by other independent evidence.
The author's credentials help explain why that assessment deserves attention. They do not replace content. A letter signed by someone very well known, but without explaining what that person observed and how they reached the conclusion, may provide little evidentiary context.
The basis of knowledge needs to appear
The letter should allow the reader to understand the relationship among the author, the person, and the facts described. Did the author work on the same project? Adopt the technology? Fund an initiative? Evaluate a publication? Hire the service? Follow results? Participate in an agency interested in the endeavor?
This explanation makes the account verifiable and helps define what the author can state. Knowing a person's general reputation is not the same as observing that person's contribution to a specific project.
Specificity matters more than adjectives
“Exceptional professional,” “outstanding leader,” or “work of great impact” are conclusions. A strong letter explains the facts that support them:
what the person's role was;
what problem the person addressed;
what method, product, or contribution the person developed;
who used or recognized the work;
what effect was observed; and
how this connects to the plan in the United States.
Not every letter needs to answer all these questions. Each should address what the author truly knows, without exaggeration or language borrowed from another professional relationship.
Letters and independent evidence have different functions
USCIS policy states that letters should be supported by other independent evidence. Depending on the fact, that may include:
contracts, agreements, or licenses;
publications and citation records;
patents accompanied by proof of use or relevance;
documentation of adoption of a technology, method, or product;
records of funding, investment, or grants;
documents showing participation and role in projects;
correspondence from clients, users, investors, or prospective employers; and
awards or material support from relevant entities.
The letter provides context. The outside document corroborates it. If an expert states that a technology was adopted, for example, contracts, licenses, usage data, or project documentation may support that statement.
This does not mean every fact needs an identical document or that a universal list works for every profile. Evidence must be appropriate to the claim it is intended to show.
“Independent evidence” is not the same as an “independent author”
There is a distinction that is often lost. The official guidance requires support through independent evidence; it does not create a rule that every letter must come from someone with no previous connection or collaboration with the person.
A supervisor may directly know a role. A client may explain use and results. An outside researcher may describe the influence of a contribution. An investor may discuss the decision to support a project. Value does not arise solely from proximity or distance: it depends on the basis of knowledge, specificity, consistency, and corroboration.
Letters from people who have never worked with the beneficiary may add an outside perspective, but they too must show how the author learned about and evaluated the work. The word “independent” does not turn an unsupported opinion into sufficient evidence.
Letters can help with more than one NIW prong
The content defines a letter's function. Depending on what it explains, it may be relevant to different parts of the analysis.
Substantial merit and national importance
An expert may explain why the specific endeavor has broader implications for a field, a region, or the public. The focus must be on the proposed endeavor, not merely on the general importance of the profession or sector.
Being well positioned to advance the endeavor
Letters can describe prior achievements, a role in projects, influence, adoption of work, support from entities, or progress already achieved. The connection to the future endeavor must be clear: praise for the past does not, by itself, prove the ability to advance a different plan.
Favorable balance for the waiver
A letter may also help explain concrete urgency, the impracticality of certification because of the endeavor, or the benefit of contributions even if other qualified workers are available. This content must address the third-prong question, rather than simply state that the author “recommends approval.”
Government letters can be useful, but are not required
USCIS separately addresses letters from interested U.S. government agencies or quasi-governmental entities. Depending on their content, they may:
explain the importance of the endeavor to a public priority or need;
describe why the person is well positioned;
show institutional interest or support; and
clarify urgency or the benefit of the contributions in the balancing inquiry.
These letters are not a requirement for every NIW. An agency letterhead and the author's title also do not guarantee weight. The letter must identify the entity's expertise, its relationship to the endeavor, and the facts that support the interest described.
What Matter of Dhanasar teaches about the record as a whole
In the case that established the three prongs, the record included several expert letters demonstrating the experts' own credentials, describing the petitioner's research, and addressing knowledge in hypersonic propulsion. It also included publications, material citing the work, documentation of research and teaching, significant participation in projects, and funding from agencies such as NASA and Air Force laboratories.
The Administrative Appeals Office considered detailed letters alongside documentation of governmental interest, use, and funding. The case shows that letters gain meaning when connected to other evidence.
It does not establish that future petitions need the same number of letters, authors with the same titles, or public funding. The lesson is evidentiary coherence, not imitation of an aerospace researcher's record.
Signs that a letter needs review
Before using a letter, it is worth checking whether it:
identifies who is writing and why that person knows the subject;
explains how the author knows the person or the person's work;
describes facts rather than only adjectives;
relates the facts to the proposed endeavor in the United States;
avoids predictions about approval or unsupported legal conclusions;
identifies, where possible, documents that corroborate the statements; and
adds information instead of repeating another letter.
This review is not meant to standardize voices. Identical letters, with the same phrasing and sequence, may hide what should make them useful: the real perspectives and knowledge of different authors.
The strategy begins with the claim, not the letter
The starting point is to identify what must be shown. Then it is possible to ask who has legitimate knowledge of that fact and what documentation confirms it. This order reduces the temptation to accumulate generic recommendations to fill a package.
No letter guarantees NIW. The person must still satisfy the EB-2 classification, the three Dhanasar prongs, and a favorable exercise of discretion. The quality of letters depends on the case and should be assessed alongside all the documentation.
To understand how letters and other documents may relate to a concrete proposed endeavor, learn about Linhares Law's EB-2 NIW practice area.