Mexico Defamation Laws: Civil, Criminal & Defences

Defamation in Mexico is primarily a civil matter at the federal level. A 2007 reform repealed the federal crimes of defamation, libel, and slander (former Penal Code Articles 350 to 363), leaving moral-damages claims under the Federal Civil Code (Articles 1916 and 1916 Bis). A minority of states still criminalise defamation.

What counts as defamation in Mexico

Mexico is a federation, so defamation is treated differently depending on whether a claim is federal, in Mexico City, or in one of the states. Broadly, defamation means communicating to others an untrue or unjustified statement that harms a person's honour, reputation, private life, or image. At the federal level the question is framed as moral damage: an unlawful injury to a person's feelings, affections, beliefs, dignity, honour, reputation, private life, or self-image. In the states that still criminalise defamation, local penal codes define offences such as difamacion (attributing a fact that harms reputation) and calumnia (falsely accusing someone of a crime). Because the rules vary by jurisdiction, the same statement can be treated as a purely civil wrong in one place and as a crime in another.

Federal decriminalisation and the civil framework

In 2007 Mexico decriminalised defamation at the federal level. A decree published in the Official Gazette (Diario Oficial de la Federacion) repealed Articles 350 to 363 of the Federal Penal Code, which had defined the crimes of defamation, libel (difamacion), and slander (calumnia). The reform was driven by recommendations from the United Nations Human Rights Committee and Mexico's National Human Rights Commission that honour should be protected through civil rather than criminal means. At the same time, the Federal Civil Code provisions on moral damages, Articles 1916 and 1916 Bis, were reformed so that harm to honour and reputation is now addressed through civil compensation. Federal defamation claims therefore seek monetary damages and correction of false information rather than criminal punishment.

Watch out: Federal decriminalisation did not erase criminal defamation everywhere. Mexico's states keep their own penal codes, and a number of them still treat defamation as a crime.

Criminal defamation in the states

Although defamation is no longer a federal crime, Mexico's federal structure means each state sets its own criminal law, and a minority of states have retained criminal defamation offences in their penal codes. Press-freedom monitors have reported that several states continued to criminalise defamation after the 2007 federal reform, with maximum prison terms generally in the range of about 2 to 3 years depending on the state and the offence. The exact offences, defences, and penalties differ from one state code to another, and the number of states retaining these crimes has changed over time as legislatures repeal or amend them. Anyone facing a potential criminal complaint relies on the specific penal code of the state where the statement was published.

Defences to a defamation claim

In federal civil cases, the Federal Civil Code framework gives weight to freedom of expression and information. Courts have generally held that statements that are true, made in good faith, or concern matters of public interest enjoy strong protection, and that public figures must tolerate a higher level of scrutiny and criticism than private individuals. The civil rules distinguish opinions and value judgments, which cannot be proven true or false, from assertions of fact. Mexico City's honour law similarly balances protection of private life, honour, and image against the rights to information and expression, and recognises that information of public interest is not actionable simply because it is unwelcome. In states that retain criminal defamation, local codes typically allow defences such as truth and good faith, but the details vary.

Remedies and damages

Federal civil remedies centre on compensation for moral damage and on correcting false information. Under Federal Civil Code Article 1916, a court may order the person responsible to pay an indemnity and, where the harm came through media, to publish a summary of the judgment or a correction. The amount is assessed by the court considering the rights affected, the degree of responsibility, the parties' economic situations, and the circumstances of the case. Mexico City's civil-liability law follows a similar approach, focusing on repairing damage to a person's moral patrimony. In the states that still criminalise defamation, penalties can include fines and, in principle, imprisonment, though enforcement and prison terms vary by state.

Limitation period

Limitation periods for defamation in Mexico depend on the jurisdiction and the type of claim. Federal and state civil codes set their own periods for moral-damage and personal-rights actions, and Mexico City's honour law sets its own deadline for bringing a civil claim. In states that retain criminal defamation, the limitation rules come from the relevant state penal and procedure codes. Because these periods are not uniform across the country, the applicable deadline turns on where the statement was published and which body of law (federal civil, Mexico City, or a particular state) governs the claim.

Online defamation

Online statements, including posts on social media, are addressed through the same civil moral-damages framework at the federal level and in Mexico City, and through state penal codes where criminal defamation survives. The focus in civil cases is on whether the online statement caused unlawful moral harm to honour, reputation, private life, or image, and remedies can include damages and correction or removal of false content. As with offline defamation, courts weigh expression and information rights heavily, particularly for content about public figures and matters of public interest. Identifying anonymous authors and establishing responsibility can be practical hurdles in online cases.

How to bring a claim

At the federal level and in Mexico City, a defamation claim is a civil action for moral damages, filed in the competent civil court, seeking compensation and correction of false information. In a state that still criminalises defamation, a victim may pursue a criminal complaint under that state's penal code in addition to, or instead of, a civil action. Because the governing law depends on where the statement was published, and because civil and state-criminal procedures and deadlines differ, anyone considering action consults a qualified Mexican lawyer (abogado) to identify the correct forum and the applicable limitation period.