Resolution Appointing Administrator Mexico (Acta de Nombramiento de Administrador)

A Resolution Appointing Administrator Mexico (Acta de Nombramiento de Administrador) is the formal corporate document by which the shareholders or partners of a Mexican company — whether a Sociedad Anónima de Capital Variable (SA de CV), Sociedad de Responsabilidad Limitada (S de RL), Sociedad Anónima (SA), or other entity governed by the Ley General de Sociedades Mercantiles (LGSM) — exercise their supreme authority to designate the person or persons responsible for managing and legally representing the company. Governed principally by LGSM Article 142 for SA de CV entities and by LGSM Articles 74 and 77 for S de RL entities, the appointment of an administrator is one of the most fundamental and frequently performed corporate acts in Mexican law.

LGSM Article 142 establishes that the administration of an SA de CV may be entrusted to either an Administrador Único (Sole Administrator) — a single individual who holds all management and representation authority — or a Consejo de Administración (Board of Directors) — a collegiate body of two or more persons who exercise management authority collectively or through delegated officers. For an SA de CV, the Administrador Único is appointed by the ordinary shareholders' meeting (Asamblea Ordinaria de Accionistas) and may be removed by the same meeting at any time without cause, unless the estatutos sociales provide for fixed terms. The outgoing administrator's period of authority ends upon the appointment and formal acceptance of the successor.

For an S de RL, LGSM Article 74 provides that the management may be entrusted to one or more gerentes (managers), who may or may not be partners (socios). The partners' meeting (Asamblea de Socios) appoints the gerente under the procedure established in the estatutos sociales and LGSM Article 77. In practice, most S de RL companies use the structure of Administrador Único or Gerente General, equivalent in function to the SA de CV administrator.

The Acta de Nombramiento de Administrador must record: the identity of the appointing body (shareholders' or partners' meeting, or board resolution for delegated appointments); the resolution number and date; the identity of the incoming administrator including their RFC, CURP, and official identification; their formal acceptance of the appointment (aceptación del cargo); their statement of compliance with applicable legal requirements — including that they are not subject to any prohibition from holding office (no inhabilitación) under the LGSM or applicable financial sector law; the scope of their management and representation authority; and the intended duration of the appointment.

Critically, the Acta de Nombramiento de Administrador is not, by itself, the instrument that confers legally enforceable authority on the administrator before third parties — that function is fulfilled by the poder notarial issued to the administrator, which must be protocolised and registered with the Registro Público de Comercio (RPC) under LGSM Article 10. The Acta is the internal corporate act, while the poder notarial is the external legal instrument. The Notario Público protocolises the Acta (incorporating it into an escritura pública) and simultaneously drafts the poder notarial for execution, producing a single escritura that accomplishes both the appointment and the power grant. This dual-function escritura is then submitted to the RPC for inscription, which gives the appointment public legal effect and enables third parties — banks, counterparties, government authorities — to verify and rely on the administrator's authority.

A Resolution Appointing Administrator Mexico is needed whenever a Mexican company designates a new Administrador Único, Gerente General, Director General, or Consejo de Administración member to manage and represent the entity.

The resolution is required upon incorporation (constitución) of a new SA de CV, S de RL, or other LGSM entity — the escritura constitutiva (incorporation deed) includes the first appointment of the administrator. For subsequently appointed administrators, a separate Acta de Nombramiento must be adopted by the shareholders' or partners' meeting.

A new appointment resolution is needed when the previous administrator resigns (renuncia), is removed (remoción), dies (fallece), or completes their term of office — the company cannot operate without an appointed administrator whose authority is registered with the Registro Público de Comercio. Gaps in legal representation create immediate operational problems: banks freeze corporate accounts, the SAT rejects tax filings, and contractual counterparties refuse to deal with an unauthorised representative.

The resolution is required when a company undergoes a change of ownership (cambio de accionistas o socios) and the new owners wish to install their own management — the Acta de Nombramiento of the new administrator is typically adopted at the same assembly that approves the transfer of shares or participaciones to the new owner.

For financial institutions and regulators, a current Acta de Nombramiento supported by a registered poder notarial is required to update corporate signatory authorities on bank accounts, to designate a new SAT representante legal for RFC purposes, and to register the new administrator with IMSS and INFONAVIT as the company's legal representative.

The resolution is also needed when a company transforms its governance structure — for example, transitioning from an Administrador Único to a Consejo de Administración, or vice versa — as part of a corporate restructuring, regulatory compliance initiative, or preparation for external financing or investment. Each change in governance structure requires a new appointment resolution and corresponding modifications to the estatutos sociales.

The resolution appointing a new administrator is also required when a company applies for credit from BBVA, Banorte, Banamex (Citibanamex), or HSBC Mexico — Mexican banks require a current, registered Acta de Nombramiento and the corresponding poder notarial before updating account signatories (firmantes autorizados) and disbursing funds. The IMSS and SAT similarly require an updated representante legal registration before accepting filings, responding to audits, or processing refund requests under the Codigo Fiscal de la Federacion. Companies undergoing change of control through a share purchase agreement (contrato de cesion de acciones) invariably require a new administrator appointment resolution as a closing condition.

A valid Resolution Appointing Administrator Mexico under LGSM Article 142 must contain the following essential elements to be legally effective and to support the issuance of a corresponding poder notarial for RPC registration:

Company Identification: Full corporate name (denominación social), RFC, Registro Público de Comercio folio mercantil, and registered office (domicilio social). The resolution should reference the escritura constitutiva to establish the company's legal identity and current governance framework.

Appointing Body and Meeting Reference: Whether the appointment is made by the shareholders' meeting (Asamblea de Accionistas) for an SA de CV, the partners' meeting (Asamblea de Socios) for an S de RL, or the board of directors for delegated appointments. For meeting-based appointments, the date, type (ordinaria/extraordinaria), quorum, and vote count must be recorded as required for any valid assembly resolution under LGSM Articles 79 and 188.

Outgoing Administrator Identification (if applicable): Name and RFC of the outgoing Administrador Único or board member being replaced, with reference to the escritura number of their original appointment. The resolution should expressly state that the outgoing administrator's appointment and associated poder notarial are revoked.

Incoming Administrator Personal Data: Full legal name, RFC, CURP, official identity document (INE/pasaporte), date and place of birth, marital status, address, and professional qualifications (if relevant). This data is required by the Notario Público for the protocolisation escritura and RPC registration.

Appointment Resolution: The text of the resolution appointing the administrator — including their title (Administrador Único, Gerente General, Presidente del Consejo), the effective date of appointment, and the duration of the term (plazo del cargo) if the estatutos specify a fixed term. LGSM Article 142 does not mandate a fixed term for the Administrador Único, and indefinite appointments subject to revocation at any time are the most common structure.

Acceptance of Appointment: The incoming administrator's express acceptance of the appointment (aceptación del cargo), including a statement that they are not subject to any legal prohibition from holding corporate office — not convicted of bankruptcy crimes (delitos de quiebra), not subject to inhabilitación under LGSM Article 151, and not prohibited from serving as administrator of a company in the same sector under sector-specific regulations.

Authority to Issue Poder Notarial: An express resolution instructing the Notario Público to issue a poder notarial to the incoming administrator with the scope of authority approved at the meeting — typically actos de administración, and if applicable, dominio and litigation authority. The assembly resolution defines the scope; the notary drafts the poder accordingly.

RPC Registration Instruction: Express instruction to protocolise the Acta and register the resulting escritura with the Registro Público de Comercio. Under LGSM Article 9, the appointment of an administrator and the associated poder must be inscribed in the RPC to be enforceable against third parties. Forms-legal.com provides this Resolution Appointing Administrator Mexico template as a starting point — the formal appointment must be protocolised before a Notario Público and the resulting escritura registered at the RPC. Engage a Mexican corporate abogado or Notario Público to confirm the appointment complies with the company's estatutos sociales and current LGSM requirements.

Regulatory and Tax Authority Notifications: After RPC inscription, the new administrator must update the company's RFC file at the SAT by submitting the Acta de Nombramiento, the new poder notarial, and the incoming administrator's identification and RFC. The SAT e.firma (electronic signature) for the company must be updated to reflect the new representative. IMSS and INFONAVIT employer accounts must also be updated so the new administrator is the authorised signatory for social security filings and payment instructions under the Ley del Seguro Social and the Ley del INFONAVIT.