Civil Lawsuit Filing Mexico (Demanda Civil)

A Civil Lawsuit Filing (Demanda Civil) in Mexico is a formal written legal pleading by which a plaintiff (actor or demandante) initiates a civil lawsuit before a competent civil court (Juzgado Civil), requesting judicial resolution of a private law dispute involving rights under the Código Civil Federal (CCF), the Código de Comercio, or applicable state civil codes. The procedural framework governing civil litigation in Mexico is the Código Nacional de Procedimientos Civiles y Familiares (CNCPF), published in the Diario Oficial de la Federación on 7 June 2023 and progressively entering into force across Mexico's states and federal courts, which replaced and unified the previously fragmented state-level procedural civil codes and the former Código Federal de Procedimientos Civiles.

Articles 310 through 325 of the CNCPF establish the formal requirements for the initial written pleading (demanda escrita) in ordinary civil proceedings (juicio oral civil). Article 310 requires that the demanda identify the parties, state the facts with precision, articulate the applicable law, and specify the relief sought (prestaciones reclamadas). Article 311 specifies the documents that must accompany the demanda — the power of attorney (poder notarial) if filing through a representative, and all documentary evidence (pruebas documentales) the plaintiff intends to rely upon at trial, since under the oral civil procedure model documents not attached to the initial demanda may be excluded at the evidentiary stage.

The CNCPF introduced a unified oral procedure (juicio oral civil) for most civil disputes, replacing the historically written and lengthy written civil process. Under the CNCPF, the typical civil proceeding involves: (1) filing of the demanda (arts. 310–325); (2) judicial review and admission (auto admisorio); (3) service of process on the defendant (emplazamiento under arts. 135–155); (4) defendant's answer (contestación de demanda under arts. 326–340); (5) preliminary hearing (audiencia preliminar under arts. 395–410); (6) oral trial hearing (audiencia de juicio under arts. 411–440) where evidence is produced and witnesses examined; and (7) judgment (sentencia under arts. 441–460).

Civil courts in Mexico have jurisdiction over a wide range of disputes: debt collection (cobro de pesos) for unpaid loans, services, or goods; breach of contract claims (incumplimiento de contrato) under CCF arts. 1949–1961 and Código de Comercio; damages claims (reclamación de daños y perjuicios) under CCF art. 1910; property disputes (conflictos de propiedad, posesión o desahucio) under CCF arts. 830–917; enforcement of promissory notes (pagarés), bills of exchange (letras de cambio), and other commercial titles under the Ley General de Títulos y Operaciones de Crédito (LGTOC); and family-related civil matters including alimony (alimentos under CCF arts. 301–323) and legal separation when not handled in family court.

Before filing under the CNCPF, plaintiffs in many civil matters must comply with the mandatory pre-litigation conciliation requirement under CNCPF art. 33 and state-level civil justice center (Centro de Justicia Alternativa) rules — particularly for disputes involving amounts under the jurisdictional thresholds for small claims or summary procedures. Conciliation records (constancias de conciliación) may be required as an attachment to the demanda.

A Civil Lawsuit Filing (Demanda Civil) in Mexico under the CNCPF arts. 310–325 is needed when private law disputes between parties cannot be resolved through negotiation, mediation, or pre-litigation conciliation, and judicial enforcement of rights becomes necessary. The demanda civil is the exclusive procedural mechanism for initiating adversarial civil proceedings before a Juzgado Civil.

A civil demanda is needed for debt collection: when a debtor fails to pay a debt evidenced by a contract, invoice, promissory note (pagaré), or other document despite written demand, the creditor must file a civil or commercial lawsuit to obtain a judgment (sentencia) and subsequently enforce it through seizure (embargo) and auction (remate) of the debtor's assets under CNCPF arts. 470–530. The type of proceeding (ordinary civil, executive commercial, or juicio sumario) depends on the nature of the evidence of debt.

A civil demanda is needed for contract breach claims: when a party to a civil or commercial contract fails to perform their obligations — delivering goods, completing services, making payments, or fulfilling conditions — the aggrieved party must file a civil lawsuit to obtain specific performance (cumplimiento forzado under CCF art. 1949) or rescission with damages (rescisión con daños y perjuicios under CCF art. 1949 and Código de Comercio art. 376).

The demanda is needed for property and possession disputes: eviction of unauthorized occupants (acción reivindicatoria under CCF art. 4), recovery of unlawfully held property (acción publiciana), and disputes over property ownership boundaries (deslinde) all require a civil lawsuit. Landlord-tenant eviction for non-payment of rent requires a demanda de desahucio — a specialized civil action under CCF arts. 2478–2490 addressed separately.

A civil demanda is needed to enforce judgments from arbitration awards (laudos arbitrales) issued under the Código de Comercio arts. 1422–1463 when a losing party refuses to comply voluntarily. Mexican courts recognize domestic arbitral awards through the homologación procedure under CNCPF art. 589.

The filing is also needed for alimony enforcement (cumplimiento de alimentos under CCF arts. 301–323), damages from traffic accidents (daños causados por vehículos under CCF art. 1913), professional liability claims (responsabilidad profesional), and inheritance disputes (acción petitoria de herencia under CCF art. 1295) that are not resolved through notarial succession proceedings.

A valid Civil Lawsuit Filing (Demanda Civil) in Mexico under CNCPF arts. 310–325 must contain the following essential elements to be admitted by the court and to initiate the oral civil proceeding.

Court Designation and Jurisdiction: Identification of the specific court (Juzgado Civil) before which the demanda is filed, including the judicial district (partido judicial), state, and whether it is a federal (Poder Judicial de la Federación) or state court. Jurisdiction is determined by: subject-matter jurisdiction (materia — civil, mercantil, or familiar) under CNCPF art. 24; territorial jurisdiction (territorio — typically the defendant's domicile under CNCPF art. 26 or the place of contract performance under art. 29); and amount jurisdiction (cuantía — local courts handle lower-value claims while district courts handle higher-value matters under the thresholds established by state judicial organization laws).

Identification of Parties: Full legal name, domicile for service of process (domicilio para oír y recibir notificaciones), and RFC or CURP of both the plaintiff (actor or demandante) and the defendant (demandado or reo). If the plaintiff is a legal entity, the corporate RFC, corporate type, and name and identification of the legal representative (representante legal) with power of attorney must be included. Under CNCPF art. 53, parties must designate an authorized email address (correo electrónico institucional) for electronic notifications through the court's Sistema Integral de Gestión Judicial.

Statement of Facts (Hechos): A numbered, chronological, and precise statement of the facts giving rise to the claim (narración de hechos), written in the first person, with each fact stated concisely in a separate numbered paragraph. Under CNCPF art. 310, facts must be stated with sufficient specificity to enable the court to identify the legal basis and enable the defendant to respond. Vague or conclusory fact statements are a common basis for court rejection (desechamiento) of the demanda.

Legal Basis (Fundamentos de Derecho): Citation of the specific articles of the applicable civil code (CCF or state Código Civil), procedural code (CNCPF), or special law (e.g., Ley General de Títulos y Operaciones de Crédito for commercial document claims) that support each element of the claim (causa de acción). The legal basis section connects the facts to the applicable legal rights violated and the remedies authorized by law.

Relief Sought (Prestaciones Reclamadas): A specific, itemized list of the judicial relief (prestaciones) the plaintiff demands from the court, which may include: (a) principal debt amount (suerte principal) in Mexican pesos (MXN); (b) contractual or legal interest (intereses pactados o legales) under CCF arts. 2395–2397 or Código de Comercio art. 362; (c) ordinary damages (daños) and lost profits (perjuicios) under CCF arts. 2108–2110; (d) court costs (gastos y costas) under CNCPF art. 140; and (e) any injunctive or precautionary measures (medidas cautelares) under CNCPF arts. 234–269 such as asset freezes (embargo precautorio) or restraining orders (prohibición de enajenar).

Documentary Evidence: All documentary evidence (documentos base de la acción) the plaintiff intends to introduce must be attached to the demanda under CNCPF art. 311. Key documents include: contracts, invoices, promissory notes, correspondence, bank statements, photographs, and expert reports. Documents not attached at the time of filing may only be admitted subsequently in limited circumstances under CNCPF art. 313.

Forms-legal.com provides this Civil Lawsuit Filing template as a reference document for Mexico. Civil litigation in Mexico requires a Licenciado en Derecho (abogado) who is an authorized member of a barra de abogados or colegio de abogados — under the Ley General de Profesiones and many state judicial organization laws, parties must be represented by a licensed attorney in civil proceedings above minimal value thresholds. Related documents include the Civil Eviction Filing (mx-demanda-desahucio-arrendamiento) and the Demand Letter (mx-carta-demanda-pago) for pre-litigation demand.