How do you find and verify a lawyer, notary, customs broker or lab in Mexico?
Check each professional in the official register for their field: the SEP's cédula portal for lawyers and accountants, the Secretaría de Economía's notary finder or the state notary college for notaries, ANAM's published lists plus the patente number for customs brokers, and the SE's list of accredited conformity bodies for NOM labs. Then put the scope, fees and responsibilities in a written contract and ask for a CFDI invoice. Membership in a bar association is a useful signal, not a license.
Which public tool checks which professional?
Four kinds of professionals touch a China-to-Mexico business: lawyers and accountants, who need a registered professional title; notaries and corredores públicos, public officials who formalize a company; customs brokers, who hold a patente; and conformity bodies and labs, accredited to test and certify against NOMs. Each has a public tool, and none is perfect, so use them together and in writing. Xin Puente is none of these professionals and gives no legal, tax or customs advice. If you are still deciding whether you need a Mexican company at all, start with our guide to entering Mexico with or without one.
| Professional | Official tool | What it confirms | What it does not |
|---|---|---|---|
| Lawyer or accountant | SEP cédula portal | A registered title and an issued cédula | Specialty, experience or disciplinary record |
| Notary or corredor público | SE MUA portal; state notary colleges | That the person is listed, with number and address | That the appointment is current: call the office |
| Customs broker | ANAM lists by customs house; the patente number | Name, patente number and status on the file date | Current standing: the files we opened date from 2022 |
| NOM lab or certifier | SE list of conformity bodies; ema | Accreditation and, where required, approval | That its scope covers your NOM, unless you check it |
How do you check a lawyer or accountant's cédula?
Open the SEP's Registro Nacional de Profesionistas portal. The form has a cédula number field and name fields: first name(s) and first surname are required; second surname and CURP are optional. A match tells you the person has a registered title and an issued cédula, which the page presents as meeting the legal requirements; it warns that its data is updated periodically (SEP).
Ask for the cédula number in writing and compare it with the name on the engagement letter. The law gives the cédula the effect of a license to practice (art. 3); someone who practices a profession that requires one without it has no right to charge fees (art. 68; art. 2608); and every professional must keep client matters confidential, except where the law requires reporting (art. 36). A cédula does not prove specialty, foreign-trade experience or a clean disciplinary record, so also ask for references.
Bar associations: a signal, not a license
The Barra Mexicana, Colegio de Abogados says it was founded in 1922; its Directorios page lists its governing bodies and committees rather than offering a public lawyer finder, and the site has a Junta de Honor section (BMA). ANADE, the national association of corporate lawyers, publishes a code of ethics and a list of certified lawyers for 2026 (ANADE). Neither replaces the cédula check.
How do you confirm a notary or corredor público?
The Secretaría de Economía's MUA portal has a page to contact a corredor or notario público: choose a state, run the search, and the results show name, state, municipality, address, postal code, type and notary or correduría number (SE, MUA). Mexico City's Colegio de Notarios offers a directory searchable by name, notary number, borough and neighborhood (Colegio de Notarios). A directory entry alone does not prove the appointment is current, so call the notaría on the number in the official directory and confirm that name and notary number match.
A notary is not your lawyer. Under Mexico City's notary law, a notary is a legal professional invested with public faith by the State and may not treat one party as the client and the other not (Ley del Notariado de la CDMX, arts. 14, 44). There, fees follow an official tariff published in the Gaceta Oficial (art. 15), and users may request information at every stage, a copy of the filing request to the Registro Público de Comercio, and the documents proving taxes and fees paid (art. 16). Other states have their own laws, so ask for a written fee estimate.
How do you check a customs broker's patente?
A customs broker (agente aduanal) is a natural person authorized by the Secretaría de Hacienda, through a patente, to handle customs clearance for others (Ley Aduanera art. 159). The patente lets the holder act before one customs house of adscripción, plus up to three more with authorization (art. 161). Three facts identify a broker: the patente number, the customs house and, if a firm stands behind the broker, the firm's RFC.
ANAM's Agentes Aduanales page links one PDF per customs house with each agent's name, patente number, authorization number, status and customs house (ANAM). The files we opened sit in a folder uploaded in October 2022, so treat them as a starting point, not proof of current standing. The Reglamento de la Ley Aduanera, as reformed on 23 February 2026, says ANAM will publish lists of disqualified agents and agencies and of patentes suspended, cancelled or extinguished (arts. 214, 235-I); we did not find that list on ANAM's site on 20 October 2026.
The law's demands on a broker also help you test one. A broker must identify clients, check that they have the infrastructure and no ties to taxpayers on the SAT's 69-B list, keep an electronic file of each customs document and give it to the client at no extra charge, and not transfer your engagement without your written authorization (art. 162). A broker that asks nothing about you, or will not share the file, is a warning sign. To confirm a patente, ANAM's Centro de Atención Aduanera is its channel for general guidance on customs procedures (ANAM).
How do you verify a NOM lab or certification body?
The SE's PLATIICA portal describes conformity assessment bodies as persons accredited by an accreditation entity and, where required, approved by the competent authority to check compliance with NOMs and other standards. Its public list can be searched by place, NOM key (the page's example is NOM-005-SCFI-2011) or keywords, and filtered by economic branch, type of accreditation and state (SE, PLATIICA). Search for the NOM that applies to your product and check that the body appears for it.
Ema, the Entidad Mexicana de Acreditación, was the first accreditation entity authorized by the SE (trade.gov). Its site has menu entries for the catalog of accredited bodies and for suspended and cancelled ones (ema), but on 20 October 2026 the security certificate of the catalog address the menu opens had expired, so it did not open normally. Use the SE list, ask the body for its accreditation number and the scope covering your NOM, and confirm both with ema.
What should you ask before you hire anyone?
Ask each professional the same short list. What is your cédula or patente number, and where can I check it? Who will do the work, who signs, and does anyone receive a commission for referring me? Do you also act for the broker, importer-of-record provider or distributor I am considering? Which fees are yours, and which are notary, government or translation costs? Who will invoice me with a CFDI, and from which RFC?
Ask who holds the originals of the articles and powers of attorney, and keep your company's e.firma and its password yourself: under the Ley Aduanera, a pedimento carrying an e.firma is treated as made by the person the signature belongs to, with the effect of a handwritten signature (art. 36).
What should a written engagement letter include?
Mexico's Código Civil Federal lets the parties fix the fee by agreement; only without one do local custom, the importance of the matter and any tariff apply (arts. 2606, 2607). Professionals may demand their fees whatever the outcome unless otherwise agreed (art. 2613), and answer to clients for negligence, lack of skill or fraud (art. 2615). State law may differ, so ask which law governs your contract.
A good letter (carta compromiso or contrato de prestación de servicios) names the parties and their legal representatives; the scope and exclusions; deliverables and dates; the fee model, what it does not include (notary, government and translation costs) and payment terms; the CFDI invoice; confidentiality, which the professions law already imposes (art. 36); who keeps the originals; how either side ends the contract; the governing law and courts; and the language, with the Spanish text prevailing and a translation for you. Any fee that depends on the outcome must say so explicitly.
Which red flags should make you walk away?
Pause, or consult another professional, if you see any of these. Items without a statute reference are our editorial checklist, not a legal rule.
A guaranteed outcome
A promise that customs will not inspect, a NOM will be granted or a case will be won. The broker answers for data and classification (art. 54), the importer for the declared value (art. 59), and fees are due whatever the outcome unless the contract says otherwise (art. 2613), so nobody can honestly guarantee a result.
A request to undervalue the goods
Customs value is based on the transaction price (art. 64). China's MOFCOM guide notes that goods exceeding the invoiced quantity by more than 10%, or missing from the invoice, can be seized and the importer fined (MOFCOM guide, in Chinese).
Cash only, no CFDI
A buyer of services must request the CFDI (CFF art. 29). You can verify any CFDI by folio fiscal and the issuer and recipient RFCs (SAT), check that an RFC exists (SAT), and search the SAT's 69-B lists of taxpayers presumed or confirmed to issue invoices for non-existent operations (presumed; definitive).
A demand for your e.firma or an RFC loan
Asking for your e.firma file and password, or offering to use someone else's RFC without a written agreement on liability.
Pressure to pay by message
ANAM says it never collects taxes by text or email, never asks for deposits to private accounts and never notifies through messaging apps (ANAM).
No written scope, no numbers
A fee quoted only as a percentage of the goods' value, pressure to sign within a day, or a refusal to show a cédula or patente number.
Verified 20 Oct 2026 against: SEP (Registro Nacional de Profesionistas), Ley de profesiones (art. 5o. constitucional), Código Civil Federal, SE (MUA), Colegio de Notarios de la CDMX, Ley del Notariado de la CDMX, Ley Aduanera, Reglamento de la Ley Aduanera, ANAM (agentes aduanales), SE (PLATIICA), ema (Entidad Mexicana de Acreditación), SAT (verificación de CFDI), ANAM (sitios falsos).
Frequently asked questions
How do I check that a lawyer in Mexico is licensed?
Search the SEP's portal by cédula number or by name; a match shows a registered title and an issued cédula (SEP). Ask for the number in writing. The check does not show specialty or disciplinary record, so also ask for references.
Is membership of a bar association proof of a license?
No. The law gives the cédula the effect of a license to practice (professions law, art. 3). Associations such as the Barra Mexicana or ANADE are useful signals about ethics and reputation, but they do not replace the cédula check (BMA; ANADE).
How do I confirm that a customs broker's patente is valid?
Ask the broker for the patente number and customs house of adscripción, compare them with ANAM's lists, and confirm in writing with ANAM, because the lists we opened date from 2022 (ANAM). When you register in the SAT importers' register you enter the broker's patente number (SAT).
Can I trust a lab that says it is accredited by ema?
Check it in the SE's list of conformity bodies by NOM key, and ask the lab for its accreditation number and scope (SE, PLATIICA). Then confirm with ema; on 20 October 2026 the certificate of the catalog address its menu opens had expired (ema).
What should I do if a professional asks for cash with no invoice?
Ask for a CFDI: a buyer of services must request one (CFF art. 29). If the professional refuses, treat it as a red flag and walk away. When you receive a CFDI, you can check it on the SAT's verification page (SAT).
Does Xin Puente replace these checks?
No. We introduce independent licensed Mexican professionals and coordinate in Chinese, but you contract and pay them directly, and the checks in this guide are yours to run. We are not a law firm, notary, accountant or customs broker.
Sources
- Secretaría de Educación Pública: Registro Nacional de Profesionistas (consulta de cédula profesional)
- Cámara de Diputados: Ley Reglamentaria del Artículo 5o. Constitucional, relativo al ejercicio de las profesiones en la Ciudad de México (última reforma DOF 19-01-2018)
- Cámara de Diputados: Código Civil Federal, Título Décimo, capítulo de la prestación de servicios profesionales
- Secretaría de Economía: Módulo Único de Autorizaciones (MUA), búsqueda de corredores y notarios públicos por entidad federativa
- Colegio de Notarios de la Ciudad de México: Directorio de notarios
- Consejería Jurídica y de Servicios Legales de la Ciudad de México: Ley del Notariado para la Ciudad de México (texto vigente)
- Cámara de Diputados: Ley Aduanera (texto vigente, última reforma DOF 19-11-2025)
- Cámara de Diputados: Reglamento de la Ley Aduanera (texto vigente, última reforma DOF 23-02-2026)
- ANAM (Agencia Nacional de Aduanas de México): Agentes Aduanales, listados por aduana
- ANAM: Centro de Atención Aduanera
- ANAM: Sitios falsos, avisos de la Agencia sobre fraudes y medios oficiales de notificación
- Secretaría de Economía (PLATIICA): Organismos de Evaluación de la Conformidad, listado de acreditados y en su caso aprobados
- Entidad Mexicana de Acreditación (ema): Conozca a nuestros acreditados
- U.S. International Trade Administration: Mexico Country Commercial Guide, Trade Standards (published 11 Feb 2026)
- Ministry of Commerce of China (MOFCOM) and partners: Country Guide for Outbound Investment and Cooperation, Mexico, 2025 edition (in Chinese; copy hosted by the Shanghai municipal government service site)
- Barra Mexicana, Colegio de Abogados, A.C.: sitio oficial (Directorios, Junta de Honor)
- Asociación Nacional de Abogados de Empresa, Colegio de Abogados (ANADE): sitio oficial (Código de Ética, Certificación)
- Cámara de Diputados: Código Fiscal de la Federación (texto vigente)
- SAT: Verificación de comprobantes fiscales digitales por internet
- SAT: Valida en línea RFC, uno a uno o de manera masiva
- SAT: Consulta la relación de contribuyentes con operaciones presuntamente inexistentes (artículo 69-B del CFF)
- SAT: Consulta la relación de contribuyentes que realizan operaciones inexistentes (listado definitivo, artículo 69-B del CFF)
- SAT: Inscríbete en el Padrón de Importadores (trámite)
Rules and figures change. Before you decide, check the official sources and confirm with a licensed professional.
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