CiteProof Checks Legal Brief Citations, Including AI-Fabricated Cases

Summary

CiteProof is a legal-brief checking service designed to find citations that need review before filing, including citations fabricated by AI systems. Users can paste a brief or upload a DOCX or PDF; the service extracts citations and quoted passages, resolves citations against CourtListener and checks U.S. Code citations against GovInfo. Results are grouped as Verified, Needs attention, or Couldn't check, but the report does not establish that a filing is legally correct. Free checks cover citation existence and identity without signup, while paid checks add quotation comparison, closest passages, pin cites, and a downloadable Verification Record for $49 per brief or $199 for five. CiteProof says it does not assess whether authority supports an argument, whether a case remains good law, or the validity of facts, regulations, state statutes, or secondary sources. It also says no AI model sees the brief: extraction and lookup are deterministic, and free checks do not store the brief; paid findings are retained for 90 days. The service offers a Word add-in, integrations with Clio, MyCase, and Smokeball, and an API. A reported October 2026 holdout check found zero false cleans among 17 bad items, but the site notes that six development items were used to tune the matcher and that attorney review remains required.