AI Can Draft Your Contract. In Latin America, You Still Answer for It
On February 13, 2026, Colombia’s Supreme Court fined a lawyer 15 monthly minimum wages for an appeal that cited ten rulings that don’t exist. He later admitted he’d used a Generative AI (GenAI) program and never checked what it produced.
Two months later, the São Paulo section of Brazil’s bar drew the same line. OAB São Paulo’s ethics tribunal unanimously ruled on April 16 that lawyers can’t rely solely on automated results and that human review must happen before anything reaches a court.
Yet neither body banned AI, and that’s what makes the pattern worth watching. Colombia’s Supreme Court and OAB São Paulo both hold the signing lawyer responsible for every line an AI tool drafts. The question lawyers face now is what they can prove about that line before it leaves under their name.
What AI Actually Does to a Legal Document
GenAI drafts legal text from an instruction, a template, or a set of existing documents. A lawyer might ask for a confidentiality clause, a first pass at a supply agreement, or a revision to every payment term, and the tool returns language in seconds. A lawyer then reviews it, edits it, and owns the result.
The reviewing lawyer carries the liability for every AI-drafted clause, and that review step is also where GenAI tools split in two. General chat models answer in a separate browser window from broad training data, so a lawyer copies the text into the contract and rebuilds every edit by hand. Tools built for contract work run inside the document itself, where they read its defined terms and return edits as tracked changes.
Why Latin America’s Courts Started Sanctioning AI Filings
Until this year, the risks of AI-drafted legal work mostly stayed hypothetical. Courts and bars in Colombia and Brazil set some of Latin America’s first concrete penalties and rules for AI use in legal practice in 2026, even as governments like Mexico’s keep adopting AI without specific rules.
Colombia Put a Number on Fabricated Citations
Colombia’s Supreme Court fined a lawyer 15 monthly minimum wages in Auto AC739-2026 for citing judgments with numbers, dates, and judges that appear in no official record.
The court counted 10 fake references in all, and four of them came in the corrected filing he submitted after it asked him to explain the first batch. So his second pass didn’t catch the errors, and it added new ones.
Still, the court’s stance on the tool itself goes beyond the fine. Colombia’s Supreme Court held that lawyers who use AI must meet a heightened standard of verification, and it confirmed that AI itself isn’t prohibited.
São Paulo’s Bar Made Human Review Mandatory
OAB São Paulo’s ethics tribunal requires human analysis of AI output before any court submission. The tribunal approved its opinion unanimously on April 16, 2026, published it on May 14, and barred lawyers from relying only on automated results.
The São Paulo opinion also requires partners to supervise how associates, interns, and assistants use AI tools. So an unchecked draft from a junior team member becomes the partner’s problem too.
What Lawyers Are Now Expected to Verify
Colombia’s ruling, São Paulo’s opinion, and Brazil’s federal bar guidance impose four concrete duties on lawyers.
- Every citation: Trace every citation to an official record, and leave out anything the court’s own repository can’t confirm.
- Every output: Read every AI output yourself before you file, since São Paulo’s bar now requires human analysis before any court submission.
- Every junior’s work: Partners answer for how associates, interns, and assistants use these tools, so the whole team needs the same rules.
- The client conversation: Tell clients how you use AI where local guidance asks for it, as the OAB Federal Council’s 2024 recommendation does in Brazil.
Brazil still has no general AI law in force, since PL 2338/2023 was awaiting a rapporteur’s opinion in the Câmara dos Deputados as of October 26, 2026, so bar rules are doing that work for now.
A Chatbot and a Drafting Tool Are Not the Same Thing
Chatbots and contract drafting tools differ mainly in where each one gets its language. A chatbot writes from general training data and hands prose back in a browser, so someone has to rebuild it as tracked changes. A drafting tool works from the team’s own precedent and clause library, and it returns edits inside the document.
A drafting tool’s grounding source decides whether a first draft reads like the team’s house standard or like generic contract prose, and that matters more to legal teams weighing AI for drafting legal documents than any feature list. Spellbook is a Microsoft Word add-in that drafts contract language from a team’s own precedent.
Consumer chat accounts put client contracts at risk whenever lawyers paste them in without reading the account’s data terms.
Accuracy deserves the same honesty. In a 2025 study by Stanford and Yale researchers published in the Journal of Empirical Legal Studies, leading AI legal research tools hallucinated between 17% and 33% of the time. Those tools answered research questions and didn’t draft contracts, so the figure doesn’t carry over to drafting. Grounding AI in real legal sources still cut invented content compared with a general chatbot, though it didn’t remove it.
Five Checks Before an AI-Drafted Document Leaves Your Desk
A five-point review checks an AI-drafted document for false citations, broken references, off-standard positions, governing-law fit, and vendor data terms. You can run all five on your next draft, starting this week.
- Trace every citation to an official source, including any you add while fixing the draft. The lawyer in Colombia’s case added four fake citations in his correction, so a second pass needs the same scrutiny as the first.
- Walk every defined term and cross-reference back to its source in the contract, since a clause can read cleanly and still point to a section that no longer exists.
- Read the liability and indemnity clauses one at a time against your own standard positions, because a generic cap or a one-sided indemnity can slip past a quick read.
- Test the draft against the deal’s governing law, since a clause that works under New York law may not hold up the same way under Colombian or Brazilian civil law.
- Ask the vendor to confirm in writing whether it trains its models on your inputs and how long it keeps them.
What This Changes for Your Next Draft
Neither Colombia’s Supreme Court nor São Paulo’s bar told lawyers which software to use, but both put the full weight of the output on the lawyer who signed it. That means the tool you pick, the sources it drafts from, and the review your team runs all become part of the record you may have to defend.
So before an AI-assisted draft goes out, make sure you can explain where its language came from and who checked it, because a client, a counterparty, or a court may ask.
