How to Draft a Legal Brief with AI in 10 Minutes (2026 Practical Guide)

The Real Problem with Drafting Legal Briefs

A Spanish lawyer spends between 3 and 6 hours drafting a standard civil claim from scratch. Most of that time is not invested in legal strategy, it goes to:

• Finding the exact applicable statute
• Verifying that cited case law exists and says what you think it says
• Structuring the brief per LEC or LRJS formal requirements
• Adapting an old template to the specific facts

Legal AI can compress that process to 10-15 minutes. Here's how.

Step 1: Define the procedure before writing

Before opening the editor, you need to know exactly what type of brief you're drafting. This determines the structure, deadlines and formal requirements.

For civil briefs (LEC):

• Ordinary proceedings (>€6,000 or specific matters, Art. 249 LEC): claim with numbered facts, legal grounds and relief sought
• Summary proceedings (≤€6,000 or enumerated matters, Art. 250 LEC): simplified claim
• Payment order (documented monetary debt, Art. 812 LEC): application with supporting document

For labour briefs (LRJS):

• Claim before the Labour Court: no strict formal requirements but must identify parties, facts and relief
• SMAC conciliation proceedings are mandatory prior to the claim (Art. 63 LRJS)

In Lexiel, the Procedure Finder automatically calculates the correct proceeding type based on the amount and subject matter.

Step 2: Generate the base structure with the correct template

Lexiel has 39 procedure templates organised by brief type and procedural role (claimant/defendant):

Each template incorporates:

1. Formal structure required by law (heading, facts, legal grounds, relief sought)
2. Smart placeholders that auto-fill with case data (client name, NIF, opposing party, court, date)
3. Pre-inserted legal references for commonly applicable articles

Step 3: Describe the facts in natural language

This is where AI comes in. Instead of writing from scratch, you describe the facts in natural language in the chat : Lexiel generates the formally structured brief with verified citations.

Step 4: Verify citations automatically

This is the most critical step. Generic language models (ChatGPT, Copilot) hallucinate case law. They cite judgments that don't exist or say something different.

Lexiel has a built-in Citation Verifier that checks every reference against the BOE (legislation) and CENDOJ (case law) in real time.

Result: 10-15 minutes vs 3-6 hours

Start drafting your first brief with Lexiel →