What a winning O-1 recommendation letter actually looks like
April 8, 2026
The four sections of every winning letter
A great O-1 letter has the same skeleton every time. Length and register vary by tier (independent / peer / colleague), but the structure is consistent.
Section 1 — Credentials of the recommender
Who they are, why their opinion matters. Two paragraphs max. For an independent expert, include institutional affiliation, citation counts, and major awards.
Section 2 — Basis of opinion
How the recommender knows you and your work. Be specific. "I have reviewed Mr. X's published work and his open-source projects" is fine. "We attended the same conference once" is not.
Section 3 — Specific contributions
The technical claims, with measurable impact. **This is where 90% of letters are too vague.** Don't say "groundbreaking work on consensus." Say: "His sub-second BFT construction, benchmarked at 4.8× the prior state of the art, has been adopted in production by Polymarket and PredictIt."
Section 4 — Expert opinion on standing
The boilerplate-but-required statement that the beneficiary is "among the small percentage at the very top of the field" — backed by the specific evidence the recommender just laid out.