Estate Partition Agreement Mexico (Acuerdo de Partición de Herencia)

An Estate Partition Agreement Mexico (Acuerdo de Partición de Herencia) is a formal legal document executed by all heirs (herederos) and legatees (legatarios) of a deceased person (de cujus) by which they collectively divide and assign the specific assets, rights, and obligations comprising the decedent's estate (masa hereditaria or acervo hereditario) among themselves by mutual agreement, without the need for judicial partition proceedings before a Juzgado Familiar, governed primarily by Articles 1780 through 1840 of the Código Civil Federal (CCF) published in the Diario Oficial de la Federación.

The Código Civil Federal, originally published in the DOF on 26 May 1928 and in force since 1 October 1932, governs inheritance, succession, and estate distribution throughout Mexico for federal matters. Each Mexican state has its own Código Civil that mirrors the CCF structure, but the CCF applies in Ciudad de México federal matters and governs the private international law aspects of cross-border successions. Book Three of the CCF (Libro Tercero — De las Sucesiones) establishes two forms of succession: testamentaria (with a valid testamento) under CCF Articles 1295–1700, and legítima or intestada (without a valid will) under CCF Articles 1599–1700.

Article 1780 CCF establishes the right of heirs to proceed to partition (partición) of the estate once the sucesor universal is determined — either through judicial declaration of heir (declaratoria de herederos) in intestate succession, or through the executor's (albacea's) inventory and valuation of estate assets. Article 1781 CCF permits heirs to partition by private agreement (convenio privado de partición) when all heirs are of legal age (mayores de edad), legally capable (capaces), and in agreement on the division — eliminating the need for judicial partition.

The albacea (executor), appointed by the testator in the will or elected by the heirs in intestate succession under CCF Article 1682, is responsible for administering the estate (masa hereditaria) during the succession process, paying the decedent's debts (deudas del de cujus) and tax obligations, and supervising the partition. Under CCF Article 1799, the albacea must be a party to the partition agreement or formally consent to it before the division takes effect and assets are transferred to individual heirs.

For estate assets that include real property (inmuebles), the partition agreement must be formalised in a notarial deed (escritura pública) executed before a Notario Público and registered in the Registro Público de la Propiedad to be opposable against third parties under CCF Article 2320. The Notario Público verifies the heirs' legal standing (calidad de herederos), confirms the estate inventory, calculates and withholds applicable ISR (under LISR Article 93 Section XXII, inheritances are generally ISR-exempt up to the legal limit) and estate transfer taxes (Impuesto sobre Traslado de Dominio, ISAI) charged by the state government, and registers the partition deed with the Registro Público.

Article 1840 CCF establishes the principle of collation (colación) — heirs who received gifts (donaciones) from the decedent during their lifetime must bring those gifts back into the estate calculation (traerlas a colación) unless the testator expressly exempted them from colación. This principle prevents one heir from receiving a disproportionate share through pre-death gifts that were not accounted for in the estate distribution. The colación obligation applies automatically to children (descendientes) inheriting from parents under CCF Article 1836.

The Suprema Corte de Justicia de la Nación (SCJN) has developed extensive jurisprudencia on partition agreements, confirming that: a private partition agreement by all competent adult heirs is fully valid without court supervision when no minor heirs are involved; notarial formalisation is mandatory for real estate transfers but not for movable-only estates; and an albacea's consent is required under CCF Article 1782 for the partition to bind the estate. These judicial interpretations make private partition the efficient default route for consensual estate distributions in Mexico.

An Estate Partition Agreement Mexico is needed whenever two or more heirs or legatees of a deceased Mexican resident must formally divide and distribute the decedent's estate assets after the succession process establishes their respective rights.

The agreement is required after a judicial declaration of heirs (declaratoria de herederos) has been issued by the Juzgado Familiar competente in an intestate succession (sucesión intestamentaria), establishing the identity and proportional shares (cuotas hereditarias) of each heir under CCF Articles 1599–1700. Once the declaration is final, the heirs must partition the specific estate assets — real estate, bank accounts, vehicles, business interests, intellectual property, receivables — and the partition agreement formally implements this division.

The document is essential in testamentary successions (sucesiones testamentarias) where the testator's will establishes each heir's proportional share (alícuota) but does not specify which particular assets each heir receives. In this situation, the heirs must negotiate and document the specific allocation of each asset among themselves — for example, one heir receives the family home while another receives the commercial property of equivalent value, with a cash adjustment (saldo de partición) if values differ.

The partition agreement is necessary when the estate includes a family business (empresa familiar), shares in a sociedad anónima (S.A.) or sociedad de responsabilidad limitada (S. de R.L.), or agricultural land (tierras agrícolas) subject to the Ley Agraria — in these cases, the partition agreement must address the transfer of business ownership, shareholding, and any corporate approvals required under the Ley General de Sociedades Mercantiles or the company's estatutos sociales.

Under CCF Articles 1780–1790, a private partition agreement by heirs is valid without court intervention when all heirs are adults, legally capable, and unanimously agree on the distribution. When heirs disagree, the court-supervised judicial partition (partición judicial) under CCF Article 1784 becomes necessary, which is significantly more time-consuming and expensive — making the private partition agreement the strongly preferred route whenever heirs can reach consensus.

The agreement is also needed when the estate includes assets held in a fideicomiso (trust) or in a pension account (subcuenta AFORE) governed by the Comisión Nacional del Sistema de Ahorro para el Retiro (CONSAR) — the partition agreement must coordinate with the AFORE's beneficiary designation procedures under the Ley del SAR and with the fiduciary institution managing any trust assets, since these assets may follow separate beneficiary designation rules outside the CCF succession framework.

For estates that span multiple Mexican states — for example, real property in Jalisco, bank accounts in CDMX, and agricultural land in Sonora — the partition agreement must comply with the real property law of each state, since each state's Registro Público de la Propiedad has independent registration requirements. The Notario Público coordinating the partition must confirm that the deed is registrable in each relevant state registry, which may require apostilles (apostillas) or consularized copies in cross-border situations.

A valid Estate Partition Agreement Mexico under Articles 1780–1840 of the Código Civil Federal must contain the following essential elements:

Decedent Identification: Full legal name (nombre completo) of the deceased (de cujus), CURP (Clave Única de Registro de Población), RFC, date of death (fecha de fallecimiento), last domicile (último domicilio), and reference to the death certificate (acta de defunción) issued by the Registro Civil and the judicial declaration of heirs (auto de declaratoria de herederos) or the probated will (testamento protocolizado).

Heirs and Their Shares: Full legal name, CURP, RFC, domicile, and proportional hereditary share (cuota hereditaria o alícuota) of each heir and legatee — expressed as a fraction (e.g., 1/3 each for three equal heirs) or percentage. The legal basis for each heir's standing must be stated: intestate succession under CCF Articles 1599–1700, or testamentary designation under the decedent's will.

Estate Inventory: A complete inventory (inventario y avalúo) of all assets forming the masa hereditaria, including: real property (inmuebles) with Registry folio number (folio real del Registro Público), cadastral value (valor catastral), and commercial value (valor comercial) per appraisal (dictamen de avalúo) prepared by a Perito Valuador authorised by the Instituto de Administración y Avalúos de Bienes Nacionales (INDAABIN); bank accounts with institution name, account number, and balance; vehicles with VIN and Tarjeta de Circulación data; business interests; life insurance proceeds; and outstanding receivables.

Debt Settlement: Identification and settlement of the decedent's outstanding debts (pasivo hereditario), including: mortgage obligations (hipotecas) on estate real property, income tax liabilities calculated under LISR, ISR on deemed capital gains from estate assets, and estate-specific obligations. Heirs assume proportional liability for estate debts under CCF Article 1735 up to the value of their inherited share.

Allocation of Specific Assets: The specific assignment of each estate asset to identified heirs, with any cash adjustments (saldos de partición o compensaciones en numerario) necessary to equalise the value of each heir's allocated share relative to their proportional cuota hereditaria.

Colación: Declaration whether pre-death gifts (donaciones en vida) from the decedent to any heir must be brought into collation (traídas a colación) under CCF Articles 1836–1840, and the corresponding adjustment to that heir's partition share.

Notarial Formalisation: For real property transfers, the partition agreement must be executed in escritura pública before a Notario Público, with payment of Impuesto sobre Traslado de Dominio (ISAI) at the applicable state rate, and registration in the Registro Público de la Propiedad under CFF and local fiscal legislation.

SAT Reporting: The Notario Público must report the partition deed to the SAT through the electronic CFDI system as required by LISR Article 126, identifying each heir and the asset value received. The notario withholds and remits any applicable ISR on capital gains arising from the partition — particularly where an heir receives an asset whose commercial value exceeds their proportional hereditary quota in excess of the ISR-exempt threshold under LISR Article 93 Section XXII.

Minor Heirs: When any heir is a minor (menor de edad), their participation in the partition agreement requires prior judicial authorisation from the Juzgado Familiar under CCF Article 448, and the DIF (Sistema Nacional para el Desarrollo Integral de la Familia) must be notified to confirm the minor's interests are adequately protected in the asset allocation.

Forms-legal.com provides this Estate Partition Agreement Mexico template as a reference for heirs undertaking estate distribution. Given the complexity of Mexican succession law, the involvement of real property, and the tax implications of asset transfers among heirs, all partition agreements should be reviewed and formalised by a Notario Público and a Licenciado en Derecho familiar with derecho sucesorio mexicano.