The Role of the Notario Público in a Mexican Property Purchase

By the RESMA Real Estate team · San Miguel de Allende · Updated: 10 Nov 2026 · Leer en español

Short answer: a Mexican notario público is an experienced lawyer appointed by the state to give legal certainty to certain acts. In a home purchase, the notario reviews the property's legal status, drafts and formalizes the deed, calculates and collects the taxes and registers the new owner. It is a very different role from a US or Canadian notary public, who mainly verifies signatures.

Notario vs. notary public

	Mexican notario público	US/Canadian notary public
Profession	Lawyer appointed by the state after examinations	Usually not a lawyer (Quebec notaries are an exception)
Main task	Drafts and authenticates public deeds	Verifies identity and signatures
Taxes	Calculates, withholds and pays transfer-related taxes	No
Registry	Files the deed with the Public Registry	No

In Guanajuato, the office is governed by the Ley del Notariado para el Estado de Guanajuato.

What the notario does in a purchase

Identifies the parties and confirms their capacity. Passports, marital status, powers of attorney, corporate documents.
Reviews the property's legal history. Previous deed, certificate of liens from the Public Registry, and that property tax and water are current.
Coordinates the appraisal used to determine the tax base.
Confirms the SRE agreement when the buyer is a foreigner.
Calculates the taxes. The buyer's acquisition tax (in San Miguel, under the municipal 2026 table) and the seller's income tax, which the notary withholds when applicable.
Drafts the deed and conducts the signing. If a party does not understand Spanish, an interpreter may be needed.
Pays the taxes and registers the deed with the Public Registry of Property.

What the notario does not do

Represent one side. The notario must act impartially, which is why many buyers also hire their own attorney or advisor.
Inspect the house. Roofs, humidity, structure and installations are the job of an inspector or architect.
Confirm every permit. Construction licenses, heritage approvals in the historic center, or condominium rules may need a separate review.
Negotiate the price or terms. That is agreed between the parties and their agents.

When independent advice makes sense

Consider your own attorney when buying land outside the urban area, a property from an inheritance, a home with construction pending regularization, or through a company or trust. The cost is small compared to a problem discovered after closing.

Practical tips

Agree on the notary in the purchase agreement.
Ask for the written fee estimate and the draft deed before the signing date.
Send the documents the notary requests early; missing papers are the most common cause of delays.
Keep a copy of the registered deed and your tax receipts.

Educational information, not legal advice. Each notary's process can vary. Confirm details with the notary handling your operation.

Frequently asked questions

Can the same notary serve buyer and seller?

Yes. There is one notary per deed, and the notario must act impartially toward both parties.

Do I have to be present at the signing?

Not necessarily. You can sign through a power of attorney granted before a Mexican notary or a Mexican consulate, or apostilled abroad. Ask the notary what format they accept.

How long does registration take?

It depends on the Public Registry's workload. Ask the notary for an estimate and for the registered copy when it is ready.

Talk to someone who knows San Miguel

Tell us what you are looking for and we will share options from our listings and the AMPI MLS, and help you plan your next steps.

Explore available properties Speak with the RESMA team Search the AMPI MLS

Sources

Sources consulted on 10 Nov 2026.