USCIS Policy
February 2025: Preponderance of Evidence in O-1
Real-world insights from recent cases. Learn what worked and how to apply these lessons.
The Legal Standard That Governs Every O-1 Decision
Every O-1 petition is ultimately adjudicated under a single evidentiary standard: preponderance of the evidence. Derived from civil litigation and codified in immigration jurisprudence through the Administrative Appeals Office's landmark precedent decision Matter of Chawathe, 25 I&N Dec. 369 (AAO 2010), this standard means that the petitioner must demonstrate that it is 'more likely than not' that the beneficiary meets the regulatory criteria. It is not a beyond-reasonable-doubt standard; it does not require certainty. It requires only that the evidence tips the scales past fifty percent in favor of eligibility.
Understanding this standard at a visceral level changes how O-1 petitions are built. Many applicants and attorneys instinctively aim for overwhelming proof—a mountain of evidence intended to leave no conceivable doubt. While comprehensive evidence is never harmful, the practical implication of the preponderance standard is that a well-organized, logically argued submission with targeted documentation can be sufficient even when the evidence is not exhaustive. The question is not 'can we prove this beyond doubt?' but 'does the totality of the evidence make extraordinary ability more probable than not?'
The regulations at 8 CFR 214.2(o)(3)(iv)(B) specify the criteria that O-1B petitions for extraordinary achievement in motion picture or television must satisfy, while 8 CFR 214.2(o)(3)(iii)(B) governs the evidence required for O-1A (sciences, education, business, athletics) and O-1B (arts) petitions. Both provisions require the petitioner to establish that the beneficiary meets either the one-time achievement criterion (a major, internationally recognized award) or at least three of the enumerated evidentiary criteria. The preponderance standard applies to each criterion individually: does the evidence make it more likely than not that this criterion is met?
This article examines how the preponderance standard operates in practice, how the Kazarian two-step analysis structures the inquiry, and how attorneys can build RFE responses that accurately frame and apply this standard to their clients' evidence.
Matter of Chawathe: What 'More Likely Than Not' Actually Means
Matter of Chawathe arose in the context of an EB-1 immigrant petition but its evidentiary standard pronouncements apply across immigration benefit categories. The AAO held that the preponderance of the evidence standard governs all immigration benefit petitions, and that this standard requires only that the evidence demonstrate that the claim is 'more probably true than not true.' The decision explicitly rejected the implicit higher standard that some adjudicators had been applying—demanding near-certainty or requiring petitioners to eliminate all doubt.
In O-1 practice, Chawathe has several practical consequences. First, it means that expert opinion letters—even from individuals who know the beneficiary professionally—carry genuine weight if they are credible, detailed, and specific. The standard does not require that experts be disinterested strangers; it requires that their testimony be probative. An expert letter that explains precisely why the beneficiary's contributions are extraordinary, with reference to specific works, publications, or projects, adds to the preponderance calculus even if the expert has collaborated with the beneficiary. Second, Chawathe means that ambiguous or incomplete evidence should be resolved in favor of the petitioner when the overall record tips past the fifty-percent threshold.
The corollary of Chawathe is that officers are not permitted to demand more than the preponderance standard requires. RFEs and denials that ask petitioners to prove their case 'beyond any doubt' or that reject credible expert testimony without articulating a specific reason for discounting it are legally infirm. When responding to an RFE that appears to impose a higher-than-preponderance standard, attorneys should explicitly invoke Chawathe and remind the adjudicator of the applicable legal framework. This is not aggressive lawyering—it is correct application of binding precedent.
Common mistake: Petitioners sometimes interpret the preponderance standard as permission to submit thin evidence, reasoning that 'more likely than not' is a low bar. This misunderstands the dynamic. The standard governs how evidence is weighed, not how much is needed. An adjudicator who finds the evidence unpersuasive—because it is vague, uncorroborated, or internally inconsistent—can still deny the petition under the preponderance standard. The goal is credible, specific, well-organized evidence, not necessarily voluminous evidence.
The Kazarian Two-Step: Structure and Application
The Ninth Circuit's decision in Kazarian v. USCIS, 596 F.3d 1115 (9th Cir. 2010), established a two-step analytical framework that USCIS formally adopted for EB-1 and O-1 adjudications. Step one asks whether the petitioner has submitted qualifying evidence for at least the required number of regulatory criteria. Step two asks whether that evidence, considered in totality, demonstrates the requisite level of achievement—extraordinary ability for O-1A, or distinction for O-1B arts cases under the original regulatory language, or extraordinary achievement for O-1B MPTV cases.
In step one, the adjudicator is supposed to count evidence without weighing its quality or ultimate significance. A press article about the beneficiary is either a 'published material about' the beneficiary or it is not; a judging assignment is either evidence of judging others' work or it is not. In step two, the adjudicator considers the overall picture: does the combined evidence establish that this person stands at the top of their field? The problem in practice is that many USCIS adjudicators conflate the two steps, applying qualitative judgments at step one that are only appropriate at step two. An RFE that says a press article 'does not demonstrate extraordinary ability' is making a step-two judgment at step one, which is a legal error.
Attorneys who understand the Kazarian structure can use it strategically in RFE responses. If an RFE misapplies step-one analysis by importing step-two qualitative assessments, the response should identify this as a legal error, cite Kazarian and the USCIS Policy Manual, and separate the analysis into its proper two-step structure. At step one, argue that each criterion is facially satisfied by the submitted evidence. At step two, present the totality argument: this person's combination of awards, press coverage, scholarly impact, leadership roles, and compensation places them unambiguously in the top tier of their field.
Under 8 CFR 214.2(o)(3)(iv)(B), MPTV O-1B petitions require evidence of leading or starring roles in productions with distinguished reputations, or critical roles in recognized organizations, or high salary/remuneration, or commercial or critically acclaimed successes, or significant recognition from organizations, critics, or recognized experts. Each of these criteria can be addressed at step one with specific, targeted documentation, and the step-two totality argument then assembles those pieces into a coherent portrait of extraordinary achievement.
Expert Letters: Weight, Credibility, and What Makes Them Probative
Expert opinion letters are among the most powerful tools in an O-1 petition, and also among the most frequently misused. A probative expert letter does three things: it establishes the expert's own qualifications and standing in the field (so the adjudicator understands why this person's opinion matters); it provides specific factual observations about the beneficiary's work and contributions (not generic praise); and it places those contributions in context by explaining why they are extraordinary relative to others in the field.
The most common flaw in expert letters is the absence of the third element—field context. A letter that says 'Dr. X is a brilliant scientist whose work I have always admired' provides almost no evidentiary value. A letter that says 'Dr. X's 2022 paper in Nature introducing a novel CRISPR targeting mechanism has been cited 847 times in 18 months—a citation rate that places it in the top 0.1% of papers published in our field during that period—and has been replicated by laboratories at MIT, Stanford, and the Broad Institute, which is highly unusual for work this recent' is genuinely probative. It gives the adjudicator concrete, verifiable information that supports the preponderance finding.
Under the Chawathe standard, adjudicators cannot simply dismiss expert letters without explanation. If an RFE or denial discounts expert testimony, it must articulate specific reasons: the expert lacks qualifications in the relevant subfield, the letter contains factual inaccuracies, the claims are internally inconsistent, or similar. A blanket statement that expert letters are 'self-serving' or 'do not establish' extraordinary ability without more is legally insufficient. When a denial takes this approach, it provides strong grounds for an AAO appeal or federal court review.
Common mistake: Some attorneys solicit expert letters from colleagues or acquaintances of the beneficiary without conducting a quality control review of the letter's content. The result is generic, formulaic letters that adjudicators have seen hundreds of times and discount accordingly. Investing time in drafting expert letter guidelines—providing specific data points, citation statistics, award descriptions, or comparative context that the expert can incorporate and personalize—dramatically improves the probative value of the resulting letters.
Objective Evidence vs. Expert Opinion: Striking the Right Balance
USCIS adjudicators and AAO decisions consistently place greater weight on objective, verifiable evidence than on expert opinion alone. Citation counts, prize money amounts, award ranking documentation, salary comparisons to industry surveys, circulation figures for publications, and box office or streaming revenue data are all examples of objective evidence that speaks for itself without requiring the adjudicator to assess anyone's credibility. Expert letters provide the interpretive framework for this objective evidence—they explain why the citation count is remarkable, or why winning a particular award matters in the field—but the objective evidence anchors the analysis.
For O-1A petitions under 8 CFR 214.2(o)(3)(iii)(B), the original contribution of major significance criterion is often the hardest to satisfy because 'major significance' is inherently subjective. Objective evidence that supports this criterion includes: citation counts from Google Scholar or Web of Science; documentation of adoption of the beneficiary's methods or findings by other researchers or by industry; licensing agreements for the beneficiary's inventions; and published commentary from other scholars discussing the impact of the work. Expert letters that reference and interpret this objective evidence are far stronger than letters that assert significance without grounding it in verifiable facts.
For O-1B arts petitions, objective evidence of distinction might include award announcement documents with circulation figures, streaming or box office data, documented sell-out performances, or comparative salary data showing that the beneficiary's compensation exceeds industry norms. The O*NET or Bureau of Labor Statistics occupational wage data can serve as a baseline against which to benchmark compensation claims. Public records of award nominees and winners can establish the selectivity and prestige of a prize. The goal is to give the adjudicator something they can verify independently, reducing reliance on assertions that require a credibility judgment.
The ideal O-1 petition weaves objective evidence and expert interpretation together throughout each criterion. Present the objective fact (award ranking, citation statistic, salary figure), then provide the expert context (why this matters in the field, what it indicates about standing among peers), then connect back to the regulatory criterion being addressed. This structure is clear, logical, and well-suited to the preponderance-of-the-evidence analysis that Chawathe requires.
RFE Response Strategy: Applying the Standard in Adversarial Conditions
Receiving an RFE on an O-1 petition is not unusual; USCIS issues RFEs on a significant percentage of O-1 filings, particularly for beneficiaries in emerging or interdisciplinary fields where the criteria mapping is non-obvious. An RFE is not a denial—it is an opportunity. The response should be treated as a second chance to present the strongest possible version of the case, not merely as a rebuttal of the officer's specific concerns.
A well-structured RFE response begins with a legal framework section that restates the applicable standard: preponderance of the evidence under Matter of Chawathe, the Kazarian two-step structure, and the specific regulatory criteria at issue (citing 8 CFR 214.2(o)(3)(iii)(B) or (o)(3)(iv)(B) as appropriate). This section serves two purposes: it educates the adjudicator reviewing the response (who may be a different officer than the one who issued the RFE), and it creates a record for any subsequent appeal by demonstrating that the petitioner raised the correct legal standard.
After the legal framework section, address each RFE concern directly and systematically. Do not bury responses in lengthy narrative; use headings that mirror the RFE's categories. For each concern, identify the specific evidence already in the record that addresses it, supplement with new evidence where available, and explain in plain language why the combined evidence meets the preponderance threshold for that criterion. If the RFE misapplied the Kazarian step-one/step-two distinction, correct the error explicitly and politely.
Common mistake: RFE responses that simply resubmit the original evidence with a cover letter asserting that 'the evidence already submitted demonstrates extraordinary ability' are rarely successful. Adjudicators who issued the RFE were not persuaded the first time; providing new context, new evidence, or a restructured analytical argument is necessary. Even if the underlying facts have not changed, presenting them differently—with better field context, stronger expert framing, or clearer criterion-by-criterion mapping—can tip the scales past the preponderance threshold.
Appeals, Motions, and the Role of the AAO
When an O-1 petition is denied despite a thorough RFE response, petitioners have two primary administrative options: a motion to reopen or reconsider filed with the same USCIS office (Form I-290B), or an appeal to the AAO. A motion to reopen presents new facts or evidence; a motion to reconsider argues that the decision was incorrect as a matter of law based on the record before the officer. For O-1 denials that involve legal errors—misapplication of the Kazarian framework, imposition of a higher-than-preponderance standard, or failure to consider probative evidence—a motion to reconsider is often the appropriate vehicle.
AAO appeals are reviewed de novo on questions of law and under the substantial evidence standard on factual questions. The AAO has issued numerous non-precedent decisions in O-1 cases that provide useful guidance on how individual criteria are interpreted and how the two-step analysis should proceed. While non-precedent decisions are not binding, they illustrate the analytical framework that experienced AAO attorneys apply, and tracking recent AAO O-1 decisions is an important part of staying current in this practice area.
Federal court review under the Administrative Procedure Act is available when the AAO affirms a denial and the petitioner believes the agency acted arbitrarily, capriciously, or contrary to law. Federal district court litigation in O-1 cases has generated a body of case law, particularly in the Ninth Circuit, clarifying the limits of USCIS discretion in applying the preponderance standard. Cases like Kazarian itself, and subsequent district court decisions building on it, establish that adjudicators may not substitute their own judgment for the field's consensus on what constitutes extraordinary achievement.
The practical takeaway for O-1 practitioners is that the preponderance standard has real teeth in adversarial proceedings. Denials that ignore credible evidence, mischaracterize the regulatory criteria, or apply an implicitly higher standard are vulnerable to reversal on appeal or in federal court. Building a record that clearly documents each evidentiary element and frames it within the Chawathe/Kazarian analytical structure is not merely good practice—it is the foundation for any successful appellate strategy if the petition is initially denied.