Validate SAT e.firma (FIEL) in real time
Confirm that the electronic signature is active, has not been revoked, and matches the declared RFC — before signing a contract, loan, or agreement.
Starting price
From $6 MXN per query
What it is and how it works
The e.firma (formerly FIEL) is SAT's legal equivalent of a handwritten signature. CRiskCo Verify queries the certificate status directly against SAT's registry and returns validity, holder, effective dates, and revocation reason when applicable.
Use cases
- Signing digital contracts, promissory notes, and agreements
- Onboarding clients and suppliers on regulated platforms
- Pre-disbursement validation for banks and lenders
- Advanced electronic signature workflows
What it returns
- Certificate status (active / revoked / expired)
- Holder RFC
- Name / legal name
- Certificate serial number
- Issue and expiration dates
- Revocation reason and date (if applicable)
Best for
Scale when you need to
Verify is the first step. Unlock SAT/CIEC for depth and Enterprise for continuous monitoring.
Verify — RFC only
One-off queries: UBO, e.firma, SIGER, and Identity. No CIEC, no friction.
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Continuous portfolio tracking, network exposure, and compliance alerts in real time.
See monitoringBuild your own ML models & scores
Train custom risk and scoring models on CRiskCo Labs using your data and our infrastructure.
Explore LabsAI-ready access (MCP)
Early access
Connect any AI assistant or agentic workflow to CRiskCo data through the Model Context Protocol.
Explore MCPGet started with e.firma validation today
Book a demo and activate your first query bundle.