Legal Source Verification

Verification as a Guarantee

No legal AI system should be used without a source verification protocol. The final responsibility always lies with the professional.

Verification Chain

1. Primary source: does the citation come from an official source? (BOE, CENDOJ, EUR-Lex)
2. Validity: is the regulation still in force or has it been repealed/amended?
3. Context: is the article cited in its correct context?
4. Case law: is the cited interpretation the current jurisprudential line?

Official Databases in Spain

Source	Content	URL
BOE	State legislation	boe.es
CENDOJ	Case law	poderjudicial.es/search
EUR-Lex	EU law	eur-lex.europa.eu
Aranzadi/La Ley	Private databases (paid)	aranzadi.es / laleydigital.es

Common Verification Errors

• Trusting the citation without verifying the exact article
• Not checking for subsequent amendments
• Citing case law superseded by more recent doctrine
• Confusing regional with state legislation

Anti-hallucination

Advanced RAG systems implement anti-hallucination mechanisms:

• Each statement carries a traceable source
• If no reliable source exists, the system indicates "I don't have sufficient information"
• Visible confidence score for the user
• Direct link to the original source