USCIS Policy
February 2026: Preponderance of Evidence in O-1
Real-world insights from recent cases. Learn what worked and how to apply these lessons.
The Preponderance of Evidence Standard Explained
USCIS evaluates O-1 visa petitions under the preponderance of evidence standard, which requires the petitioner to show that their claim is more likely true than not — essentially a greater than fifty percent probability. This is significantly lower than the clear and convincing evidence standard or the beyond reasonable doubt standard used in different legal contexts, yet many O-1 applicants in February 2026 do not fully appreciate what this standard means for how they should build and present their cases. Under preponderance of evidence, if an adjudicator finds that the evidence tips the scale even marginally in the petitioner's favor, the criterion should be considered met. This standard was authoritatively clarified for USCIS adjudications in Matter of Chawathe, 25 I&N Dec. 369 (AAO 2010), which established that USCIS cannot demand evidence beyond what is necessary to establish a claim as probably true, and that reasonable inferences from the evidence must be credited.
The practical implication of the preponderance standard is that O-1 petitioners do not need to provide overwhelming or definitive proof for each claimed criterion. Circumstantial evidence, inferential conclusions drawn from documentary records, and expert opinion that is not independently verifiable all carry weight under this standard provided they are credible and consistent with the overall record. For February 2026 filings, this means that if your evidence establishes a reasonable basis for concluding that you have received prizes, judged the work of others, or made original contributions of major significance, that evidence should satisfy the regulatory requirement. Understanding this standard empowers petitioners and their attorneys to file strong cases even when certain evidence is less than perfect, provided the overall evidentiary record supports the claimed level of extraordinary ability under the more-probably-true-than-not threshold.
How USCIS Applies the Two-Step Kazarian Framework
The Kazarian v. USCIS, 596 F.3d 1115 (9th Cir. 2010) decision established a mandatory two-step analytical framework that adjudicators must follow when evaluating O-1 petitions. In step one, the adjudicator determines whether the petitioner has submitted qualifying evidence for at least three of the applicable regulatory criteria — this is a threshold determination focused on whether the type and quality of evidence submitted matches what the regulation requires. In step two, the adjudicator conducts a final merits determination, evaluating whether the totality of evidence demonstrates that the petitioner has sustained national or international acclaim and that their achievements have been recognized in their field through extensive documentation that sets them far above ordinary practitioners.
The preponderance of evidence standard applies at both steps of the Kazarian analysis, though it operates somewhat differently at each stage. At step one, when deciding whether a particular exhibit qualifies under a specific criterion, the adjudicator should credit evidence that more likely than not establishes the claim. At step two, the adjudicator weighs all evidence holistically to assess the overall level of distinction. In February 2026, petitioners should be aware that some adjudicators improperly conflate the two steps by requiring step-two-level distinction when evaluating threshold step-one evidence — essentially pre-judging the overall merit at the criteria-matching stage. If you receive an RFE or denial that appears to apply an elevated evidentiary standard at the threshold stage, this analytical error can be challenged on appeal to the AAO or through a motion to reconsider citing the proper Kazarian framework and Matter of Chawathe.
Applying the Standard to Common O-1 Evidence Types
For the awards criterion at 8 CFR 214.2(o)(3)(iii)(B)(1), the preponderance standard means that if an award was competitive, recognized within the field, and given based on professional excellence, it qualifies even if it is not internationally famous. A best paper award at a respected academic conference satisfies this criterion because the evidence more likely than not establishes that the petitioner received a prize for excellence in the field. USCIS should not deny this evidence merely because the conference is not as prestigious as the Nobel Prize. Document the number of submissions considered, the selection committee's composition and credentials, the award's recognition within your professional community through media coverage or institutional acknowledgment, and the selection criteria applied. This documentation makes it more probably true than not that the award meets the regulatory definition.
For the original contributions criterion, the preponderance standard requires evidence that your contributions are more likely than not of major significance to the field. This does not require proof that your contribution revolutionized the entire discipline or is universally known. Evidence that your research, methodology, technology, or artistic innovation has been adopted by other professionals, cited in subsequent peer-reviewed work, recognized through awards or grants, or incorporated into industry practice typically satisfies this threshold under the preponderance standard. The key is that the evidence collectively, when considered under a more-likely-than-not framework, supports the conclusion that your contribution went beyond what is ordinarily expected of practitioners in your field and had a meaningful impact on how the field develops. Expert letters that explicitly state this conclusion under the applicable legal standard give adjudicators the clearest possible path to a favorable finding.
Responding to RFEs Using the Preponderance Standard
Requests for Evidence are common in O-1 adjudications, and February 2026 petitioners should prepare responses that explicitly and confidently invoke the preponderance of evidence standard. When USCIS issues an RFE stating that submitted evidence is insufficient to establish a criterion, your response should address the specific deficiency identified while also reminding the adjudicator of the applicable legal threshold. Quote Matter of Chawathe, 25 I&N Dec. 369 directly, emphasizing that the petitioner need only show that their claim is more probably true than not, and that this standard requires giving credit to reasonable inferences from the evidence. If the RFE suggests that USCIS is applying an elevated standard — for example, by seeming to require nationally or internationally famous organizations when the regulation does not include that requirement — respectfully but clearly articulate the correct legal framework with specific regulatory citations.
Structure your RFE response to first address each specific point raised by the adjudicator with additional evidence, explanation, or legal argument, and then provide a comprehensive final merits summary that ties all evidence — both originally submitted and newly added — together under the Kazarian step-two framework. Include any new evidence obtained since the original filing, such as additional expert letters, updated citation metrics, new awards or publications, or additional media coverage. Each new exhibit should be accompanied by a brief explanation of how it strengthens the evidentiary record and why it supports a finding under the preponderance standard. Your attorney's brief should explicitly walk the adjudicator through both steps of the Kazarian analysis, demonstrating that the threshold step-one requirements are met and that the totality of evidence under step two establishes extraordinary ability under the more-probably-true-than-not standard.
Common Errors in Applying the Preponderance Standard
One of the most damaging errors petitioners make is voluntarily applying a higher-than-required evidentiary standard to their own petitions. When an attorney's cover letter or a petitioner's self-assessment concludes that certain evidence is not strong enough to include, when it actually meets the preponderance threshold, the petition is weakened unnecessarily. The preponderance standard means that borderline evidence should be included with appropriate contextual explanation rather than excluded. If your evidence makes a criterion's satisfaction more likely than not when combined with expert interpretation, it belongs in the petition. Excluding it leaves the adjudicator with less to work with and potentially tips a close case against the petitioner.
Another common error is failing to respond specifically to each point in an RFE, instead submitting a broad package of new evidence without directly addressing the adjudicator's stated concerns. USCIS RFEs are carefully structured documents that identify specific evidential deficiencies. Responding with a scatter-shot of new documents without addressing each point directly suggests to the adjudicator that the new evidence may not actually resolve the identified weaknesses. Your response must be organized point-by-point, mirroring the structure of the RFE itself, so the adjudicator can easily verify that each concern has been addressed with evidence that more likely than not resolves it under the preponderance standard.
Strategic Tips for Maximizing Evidence Under This Standard
The preponderance standard enables several powerful strategic approaches for O-1 petitioners in February 2026. First, file evidence for more criteria than the minimum three required whenever possible. If your evidence for any single criterion is borderline, having five or six criteria represented provides meaningful redundancy — even if an adjudicator discounts one or two categories at the threshold stage, the remaining evidence may still satisfy the three-criterion minimum. This strategy also improves the final merits determination by presenting a fuller picture of extraordinary ability across the breadth of your professional life. Second, prioritize volume and diversity of evidence within each criterion. Multiple independent pieces of evidence — two separate award certificates, three media articles from different publications, citations from five different research groups — are more persuasive than a single piece because they collectively make the claim more probably true through corroboration from independent sources.
Third, use expert letters strategically to bridge any gaps between documentary evidence and the conclusions you need USCIS to draw. An expert who explains explicitly why a particular achievement demonstrates extraordinary ability, using the specific language of the regulatory standard, provides the interpretive framework that helps adjudicators apply the preponderance standard correctly and reach the right conclusion. Fourth, address potential weaknesses proactively in your original petition letter rather than waiting for an RFE. If you anticipate that an adjudicator might not find certain evidence persuasive on its face, include contextual explanation upfront that frames the evidence within the preponderance framework and explains why the totality of the record, even including the weaker exhibit, tips the balance in your favor. This approach demonstrates awareness of the standard, guides the adjudicator toward the correct analytical methodology, and often prevents RFEs that would otherwise add months and thousands of dollars to the petition process.