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Expert Witness Designation Request Mexico (Solicitud de Dictamen Pericial)

Expert Witness Designation Request Mexico (Solicitud de Dictamen Pericial)

SOLICITUD DE DICTAMEN PERICIAL — DESIGNACIÓN DE PERITO DE PARTE

Código Nacional de Procedimientos Civiles y Familiares (CNCPF) Arts. 341–353

I. DATOS DEL JUZGADO Y EXPEDIENTE

Juzgado / Tribunal: [Court Name]

Número de Expediente: [Case Number]

Tipo de Juicio: [Proceeding Type]

Actor / Demandante: [Plaintiff Name]

Demandado: [Defendant Name]

Parte Oferente de la Prueba Pericial: [Designating Party]

II. DATOS DEL LICENCIADO EN DERECHO OFERENTE

Nombre del Licenciado en Derecho: [Attorney Name]

Cédula Profesional (DGP-SEP): [Attorney Cedula]

Domicilio para Notificaciones Judiciales: [Attorney Address]

III. PERITO DESIGNADO (PERITO DE PARTE)

Nombre Completo del Perito: [Expert Name]

Especialidad: [Expert Specialty]

Cédula Profesional (DGP-SEP): [Expert Cedula]

Domicilio del Perito para Notificaciones: [Expert Address]

Honorarios Periciales Acordados: [Expert Fee]

El perito designado cumple con los requisitos del Artículo 347 del Código Nacional de Procedimientos Civiles y Familiares (CNCPF): posee título profesional y cédula profesional vigente en la especialidad indicada, expedidos por la Dirección General de Profesiones (DGP) de la Secretaría de Educación Pública, verificables en el portal cedulaprofesional.sep.gob.mx. El perito designado no se encuentra en ninguno de los supuestos de impedimento previstos en el Artículo 347 CNCPF.

Los honorarios periciales de [Expert Fee] serán depositados ante la Secretaría del Juzgado dentro del plazo que el Honorable Juzgado fije en el auto de admisión de pruebas, conforme al Artículo 349 CNCPF.

IV. CUESTIONARIO PERICIAL (PUNTOS A DICTAMINAR)

La parte oferente solicita al perito designado que se pronuncie sobre los siguientes puntos técnicos relacionados con los hechos controvertidos en el presente juicio:

[Pericial Questionnaire]

El cuestionario pericial se propone conforme al Artículo 341 CNCPF y se sujeta a la valoración del Honorable Juzgado, quien podrá hacer las precisiones que estime pertinentes al cuestionario en el auto de admisión de la prueba pericial.

V. DOCUMENTOS Y MATERIALES PARA LA ELABORACIÓN DEL DICTAMEN

Para la elaboración del dictamen pericial, el perito deberá revisar los siguientes documentos, materiales y evidencias:

[Materials to Review]

La parte oferente garantiza que los materiales señalados estarán disponibles para el perito dentro del plazo designado por el Juzgado para la elaboración del dictamen. El dictamen pericial deberá cumplir con los requisitos mínimos del Artículo 350 CNCPF: descripción de la metodología utilizada, listado de materiales revisados, conclusiones técnicas fundamentadas, y declaración bajo protesta de decir verdad y actuar con objetividad.

VI. PLAZO PROPUESTO PARA LA EMISIÓN DEL DICTAMEN

La parte oferente propone un plazo de [Proposed Timeline] para que el perito designado emita su dictamen escrito, contados a partir del auto de aceptación del cargo. Se solicita respetuosamente al Honorable Juzgado que tome en consideración la complejidad técnica de la investigación pericial al fijar el plazo definitivo en el auto de admisión de pruebas, conforme al Artículo 350 CNCPF.

En la audiencia de juicio oral (audiencia de juicio), el perito presentará oralmente sus hallazgos y conclusiones y estará sujeto al interrogatorio (interrogatorio al perito) de la parte contraria conforme al Artículo 352 CNCPF.

FIRMA DE LA PARTE OFERENTE

En [Filing City], a [Filing Date].

Por la parte [Designating Party]:

Licenciado/a en Derecho Oferente: [Attorney Name]

Cédula Profesional: [Attorney Cedula]

Firma: _________________________ Fecha: _________________________

El Perito Designado — Acuse de Aceptación del Cargo:

[Expert Name] — Cédula: [Expert Cedula]

Declaro aceptar el cargo de perito de parte en los términos de la presente designación y me comprometo a actuar con objetividad e independencia técnica.

Firma: _________________________ Fecha: _________________________

Attorney for Designating Party (Licenciado/a en Derecho de la Parte Oferente)

________________

Signature

Designated Expert (Perito Designado)

________________

Signature

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What Is a Expert Witness Designation Request Mexico (Solicitud de Dictamen Pericial)?

An Expert Witness Designation Request Mexico (Solicitud de Dictamen Pericial) is the formal written petition filed by a party in civil, commercial, family, or administrative litigation before a Mexican court, formally designating a qualified expert witness (perito) to provide a technical opinion (dictamen pericial) on specialized matters beyond the competence of the presiding judge. The designation and testimony of expert witnesses in Mexico is governed primarily by the Código Nacional de Procedimientos Civiles y Familiares (CNCPF), published in the Diario Oficial de la Federación on 7 June 2023 and entering into force progressively from 2024, which for the first time creates a unified national procedural code for civil and family matters applicable in all thirty-one states and Mexico City — replacing the patchwork of state-level civil procedural codes that previously governed each jurisdiction independently.

A dictamen pericial is considered expert evidence (prueba pericial) under Article 341 of the CNCPF and constitutes one of the most influential forms of evidence in Mexican civil and commercial litigation — judges regularly adopt expert opinions as the basis for technical factual determinations, particularly in property valuation disputes, medical malpractice claims, accounting fraud cases, environmental damage assessment, construction defect litigation, and forensic document authentication. Under Article 345 CNCPF, each party to the litigation may designate their own expert witness (perito de parte), and the court may independently appoint a third neutral expert (perito tercero en discordia) when the party experts' opinions conflict irreconcilably — the court-appointed expert's opinion typically carries greater weight in judicial deliberation.

Experts in Mexican legal proceedings must hold a professional degree (título profesional) and professional license (cédula profesional) in the relevant discipline from a recognized Mexican university or, for foreign academic credentials, a degree recognized (revalidado) by the Secretaría de Educación Pública (SEP). Under Article 347 CNCPF, the designated expert must accept the appointment (aceptar el cargo) and take an oath (protesta de decir verdad y actuar con objetividad) before the court within the period specified in the procedural order (auto de admisión de pruebas). The expert is entitled to receive a fee (honorarios periciales) from the party designating them, which must be deposited with the court secretary (secretario del juzgado) as a security for payment under Article 349 CNCPF.

The CNCPF introduces significant improvements to the expert witness process compared to the prior state-level procedural codes. Article 350 CNCPF requires experts to file their written dictamen within the period fixed by the court (typically twenty to forty-five working days depending on the complexity of the investigation), and the dictamen must comply with minimum formal requirements — including a methodology section explaining the scientific or technical basis for the conclusions, a description of the materials and documents reviewed, and a sworn statement (declaración bajo protesta) that the opinion is objective and not influenced by either party. Article 352 CNCPF allows the opposing party to cross-examine the expert (interrogatorio al perito) at the oral hearing (audiencia de juicio oral), making oral cross-examination of experts a central feature of the reformed adversarial civil procedure system.

For federal administrative proceedings — tax disputes before the Tribunal Federal de Justicia Administrativa (TFJA), regulatory challenges before the Poder Judicial Federal, and constitutional amparo proceedings — expert evidence is governed by the Ley de Amparo (for amparo proceedings) and the Ley Federal de Procedimiento Contencioso Administrativo (for TFJA proceedings), which have their own expert designation procedures. Labour court (Tribunal Laboral) expert proceedings are governed by the Ley Federal del Trabajo Articles 782 through 792.

When Do You Need a Expert Witness Designation Request Mexico (Solicitud de Dictamen Pericial)?

An Expert Witness Designation Request Mexico under CNCPF Articles 1–10 is needed in any civil, commercial, family, or administrative proceeding where a party requires technical, scientific, or specialized expert evidence to establish facts material to the dispute that are beyond the knowledge of a generalist judge.

The solicitud de dictamen pericial is required in real estate valuation disputes — compraventa price disputes, expropriation compensation challenges (juicios de amparo contra expropiación), partition of common property (partición de copropiedad), and construction defect claims — where a certified appraisal engineer (perito valuador certificado) must quantify the fair market value (valor comercial) or replacement cost of property. CONAVI-certified appraisers (peritos valuadores autorizados por CONAVI) are the most commonly designated experts in these proceedings, and their methodologies are governed by NMX-R-081-SCFI-2015 (professional appraisal standard).

The designation request is needed in medical malpractice claims (juicios por responsabilidad médica) where a certified medical specialist (médico especialista) must evaluate the treating physician's conduct against the applicable medical standard of care (lex artis médica). Medical expert designations in Mexico are frequently made through the Comisión Nacional de Arbitraje Médico (CONAMED) for healthcare disputes that qualify for alternative dispute resolution before proceeding to civil court — CONAMED maintains a registry of qualified medical experts by specialty.

Expert designation is required in accounting and corporate fraud disputes — shareholder oppression claims, partnership dissolution proceedings, and commercial fraud (fraude mercantil) litigation — where a certified public accountant (Contador Público Certificado — CPC) must reconstruct financial records, assess business value, or identify fraudulent transactions. The Instituto Mexicano de Contadores Públicos (IMCP) maintains a registry of CPCs qualified to serve as forensic accounting experts in legal proceedings.

The solicitud de dictamen pericial is necessary in environmental damage cases under the Ley General del Equilibrio Ecológico y la Protección al Ambiente (LGEEPA), where an environmental engineer (ingeniero ambiental) or ecologist (ecólogo) must assess the nature, extent, and remediation cost of contamination or ecological damage. Environmental expert designations frequently arise in SEMARNAT administrative proceedings, PROFEPA enforcement actions, and civil class actions (acciones colectivas) under the Código Federal de Procedimientos Civiles.

In family law proceedings — divorce with contested asset division (divorcio con liquidación de bienes), child support modification (modificación de pensión alimenticia), and custody disputes involving assessments of parental capacity (evaluación de capacidad parental) — courts regularly require psychological (psicólogo forense) and social work (trabajador social forense) expert opinions. The Unidad de Servicios Periciales of each state Poder Judicial provides court-appointed expert services for family proceedings involving parties without resources to retain private experts.

Expert witness designations are also required in document authentication proceedings (cotejo de documentos) where a forensic handwriting expert (perito calígrafo o grafoscopista) must determine whether a signature or handwritten document is genuine or forged. This type of expert evidence arises frequently in contract disputes, will contestations, and promissory note enforcement (ejecución de pagaré) proceedings where the defendant challenges the authenticity of the contested instrument.

What to Include in Your Expert Witness Designation Request Mexico (Solicitud de Dictamen Pericial)

A valid Expert Witness Designation Request Mexico under CNCPF arts. 1–10 must contain the following elements to comply with court procedural requirements and so the designated expert's opinion will be admitted as valid evidence at the oral hearing stage.

Case and Court Identification: Full name of the court (juzgado or tribunal) before which the proceeding is pending, the case number (expediente or número de causa), the names of the plaintiff (actor) and defendant (demandado), and the type of proceeding (juicio oral mercantil, juicio de divorcio, juicio ordinario civil, etc.). The request must reference the specific procedural stage (etapa procesal) at which expert evidence is being offered — under CNCPF Article 301, evidence must typically be offered within the written preliminary stage (etapa escrita) before the audiencia preliminar.

Identity of the Designating Party: Full legal name, RFC or CURP, and domicile for notifications of the party making the designation (oferente de la prueba pericial). If a legal entity, the company's razón social and the name and power of attorney details of the legal representative. The designating party's attorney (abogado or licenciado en derecho) must also be identified with their cédula profesional number from the Dirección General de Profesiones (DGP) under the SEP.

Identification of the Designated Expert (Perito de Parte): Full legal name, academic credentials (título profesional and cédula profesional), specialty area (especialidad), and domicile for court notifications. The expert's cédula profesional must be verified in the DGP registry at cedulaprofesional.sep.gob.mx — designating an expert without a registered cédula is grounds for rejection. The expert must not be in any of the disqualifying relationships listed in CNCPF Article 347 — cannot be a close relative of either party, cannot be an interested party in the litigation outcome, and cannot be an employee of a party.

Scope of the Expert Opinion (Cuestionario Pericial): A precise list of technical questions (puntos periciales or cuestionario) to which the expert is asked to respond in their written dictamen. The cuestionario defines the scope of the expert's investigation and the court's reliance — questions must be specific, technically meaningful, and directly related to the disputed facts. Overly broad or legally framed questions (asking the expert to reach legal conclusions rather than factual determinations) may be struck from the cuestionario by the judge at the audiencia preliminar. Each question in the cuestionario should address a discrete factual issue — for example, in a construction defect case: (1) whether the structural crack in the east wall is consistent with improper concrete mixture specification; (2) what remediation measures are required; (3) what is the estimated cost of remediation.

Documents and Materials to be Reviewed: A list of all documents, physical evidence, sites, or technical records that the expert needs to review to prepare the dictamen — contracts, technical specifications, photographs, test results, financial statements, medical records, or other relevant materials. The party must make these materials available to the expert within the period the court grants for preparation of the dictamen.

Estimated Expert Fee (Honorarios Periciales): The estimated fee (honorarios) agreed with the expert, which must be deposited with the court secretary (secretario del juzgado) as a guarantee of payment under CNCPF Article 349. Failure to deposit the fee within the period established by the court may result in the expert witness designation being declared forfeited (desierta la prueba pericial).

Proposed Timeline: Under CNCPF Article 350, the party may propose a timeline for the expert to deliver the dictamen (typically twenty to forty-five working days). The court sets the definitive deadline in the auto de admisión de pruebas — the court's timeline governs, but the party's proposal may influence it for particularly complex technical investigations.

Forms-legal.com provides this Expert Witness Designation Request Mexico template as a practical starting point for parties and their attorneys preparing for civil or commercial litigation. Expert evidence is one of the most technically demanding aspects of Mexican civil procedure — the quality of the cuestionario pericial, the selection of a qualified and credible expert, and the timely filing of the designation all significantly influence litigation outcomes. Parties are strongly advised to consult a Licenciado en Derecho with civil or commercial litigation experience before designating an expert, so that the scope of the expert's investigation is properly calibrated to the specific factual disputes at issue in the case.

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BibTeX
@misc{formslegal-expert-witness-designation-request-mexico,
  author       = {{Forms Legal}},
  title        = {Expert Witness Designation Request Mexico (Solicitud de Dictamen Pericial) (Mexico)},
  year         = {2026},
  howpublished = {\url{https://forms-legal.com/mexico/government/court-forms/expert-witness-designation-request-mexico}},
  note         = {Free legal document template}
}

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