Courtesy translation. This is an English translation provided for convenience. The official, legally binding text is the Spanish-language Terms of Use. In case of any discrepancy, the Spanish version prevails.
Terms of Use
Last updated: September 26, 2026 · Version 3.0
These Terms govern the use of EFOSGratis.com (the "Site"), operated by iAudita, in turn operated by TSCANCUN, S.A.S. de C.V., with address at Av Chapultepec #417 A PH Col. Juárez, Mexico City, 06000, Mexico. By using the Site, you (the "User") accept these terms and the Privacy Notice. If you do not agree, do not use the Site.
The account belongs to iAudita. Signing up from the Site (with the form or "Sign up with Google") creates an account on the iAudita platform (app.iaudita.com), and you accept the iAudita Terms & Conditions (in Spanish) and the iAudita Privacy Notice (in Spanish). Everything related to the account —plans, trial period, payments, refunds, connecting your e.firma (FIEL), cancellation and downloading your information— is governed by those documents.
1. What the Site offers
- Information about companies issuing invoices for simulated transactions (EFOS) and Articles 69-B and 49 Bis of Mexico's Federal Tax Code.
- A free public lookup, with no sign-up, to check whether an RFC appears on the lists the SAT publishes under those articles.
- A waitlist for RFC list monitoring.
- Sign-up for a free iAudita account, which includes the EFOS screen to check your own invoices against the lists. This requires connecting your e.firma inside iAudita. Each plan's features and changes are governed by iAudita's terms.
2. The public RFC lookup
2.1 Source and updates
The information comes from the SAT's publications in the Official Gazette (DOF) and on its portal. We update our copy several times a day from what the SAT publishes and show the update date next to the lookup. There may be a delay between an SAT publication and our copy.
2.2 Scope
The lookup covers only the lists under Articles 69-B and 49 Bis of the Federal Tax Code. It does not cover the Article 69 list (taxpayers not located, with final tax debts, among others), the tax compliance opinion or any other list or registry.
2.3 Informational nature
The result is informational only: it is not an official certificate, does not constitute tax or legal advice and does not guarantee a taxpayer's status. "Not listed" means the RFC is not in our copy as of the update date shown. Before making decisions with tax effects, verify on the SAT portal and consult your accountant or lawyer.
2.4 Usage limits
To keep the lookup available for everyone, we limit lookups per IP address and per visitor (currently 25 every 10 minutes and 80 per day per IP). We may adjust these limits at any time.
3. Acceptable use
The following is prohibited:
- Extracting, copying or reproducing the lookup's information in bulk or by automated means (bots, scripts, scraping), or attempting to rebuild the lists.
- Circumventing lookup limits or the Site's security measures, including using several IP addresses, proxies or identities for that purpose.
- Offering the lookup as a service to third parties, reselling it or integrating it into other products without prior written authorization.
- Disrupting the Site, introducing malicious code or impersonating someone else.
- Using the information for unlawful purposes or to harass or defame taxpayers.
Consequences: we may block, without prior notice, IP addresses or visitors that break these rules —automatically for 7 days when abuse is detected and, in serious cases, indefinitely— and take any applicable legal action.
4. Waitlist
Joining the waitlist creates no obligation for either party. We do not guarantee that list monitoring will launch, nor its date, conditions or price. Your data is processed under the Privacy Notice and you can unsubscribe at any time.
5. Intellectual property
The design, texts, code, the EFOSGratis and iAudita brands and the lookup tool belong to TSCANCUN, S.A.S. de C.V. or are used with authorization. The information published by the SAT is publicly accessible and we do not claim ownership of it; our compilation, its presentation and the tool are protected. You are granted a limited, non-exclusive and revocable license to use the Site for personal purposes or your company's internal purposes.
6. Third-party links and services
The Site may link to or rely on third-party services (for example, the SAT portal or Google). We are not responsible for their content, availability or privacy practices.
7. Disclaimer and limitation of liability
The Site and the lookup are provided "as is" and "as available", with no guarantee of accuracy, timeliness, completeness or continuous availability. To the extent permitted by law, we are not liable for decisions made based on the Site's information, nor for rejected deductions, tax assessments, fines, losses or damages arising from its use or inability to use it. As a free service, our maximum liability to the User is zero pesos, except for liability that cannot be excluded by law.
8. Indemnification
The User agrees to hold TSCANCUN, S.A.S. de C.V. and iAudita harmless from any claim arising from misuse of the Site or breach of these terms.
9. Changes
We may change these terms at any time. Changes will be published on this page with the update date; continued use of the Site means you accept them.
10. Governing law and jurisdiction
These terms are governed by the laws of the United Mexican States, without regard to their conflict-of-law provisions. For their interpretation and enforcement, the parties submit to the competent courts of Mexico City, and the User waives any other jurisdiction that may correspond by reason of present or future domicile.
11. Contact
Legal: [email protected]
Privacy: [email protected]
Support: [email protected]
Address: Av Chapultepec #417 A PH Col. Juárez, Mexico City, 06000, Mexico
Last updated: September 26, 2026 · Version 3.0