A creditor pursuing a commercial debt in Mexico may face a timing problem: informing the debtor about an intended asset-preservation measure can create an opportunity to move the very funds the creditor is trying to preserve.
Mexican commercial law addresses this risk through providencias precautorias, or precautionary measures. One of them is retención de bienes, which may extend to money held in bank accounts when the statutory requirements are satisfied.
This raises two separate questions.
Can a Mexican court order the retention of bank funds before the debtor has been heard?
And if it does, what procedural remedy can the affected party use to challenge the measure?
The first question is governed principally by the precautionary-measure provisions of the Mexican Commercial Code. The second has become particularly important following developments in Mexican jurisprudence in 2025 and 2026.
The answer is not the same for every type of commercial proceeding.
Can bank funds be retained without hearing the debtor first?
Mexican commercial law allows precautionary measures to be requested before the main proceeding begins or after it has already been initiated.
Under Article 1177 of the Commercial Code, the precautionary measures regulated by the Code may be ordered as preliminary measures before the principal claim or during the proceeding itself.
Where the measure is sought before the principal action, the statutory framework allows the court to decide on the application without first summoning the person against whom the measure is requested, provided that the legal requirements have been satisfied.
The logic is practical.
A precautionary measure intended to preserve assets may lose much of its effectiveness if the debtor receives advance notice and has an opportunity to transfer or dissipate those assets before the measure can be implemented.
This does not mean that the debtor permanently loses the opportunity to be heard.
Once the retention has been carried out, Article 1179 provides the affected person with a period of three days to make the submissions considered appropriate. The Commercial Code also provides mechanisms through which the measure may be lifted when the affected party deposits the amount or object claimed or provides sufficient security under the applicable rules.
The procedural structure therefore separates two stages: preserving the assets without necessarily giving advance notice and allowing the affected party to respond after the measure has taken effect.
Why bank accounts receive special treatment
Money held in a bank account differs from many other categories of property because it can potentially be transferred rapidly.
The Mexican Commercial Code expressly addresses this problem.
Article 1168 regulates precautionary retention and includes money in cash, funds deposited with credit institutions and other fungible assets within its framework.
For these categories of property, the statutory scheme presumes the relevant risk of disposal, concealment or dissipation unless the person affected by the measure guarantees the amount of the debt.
This is significant because a creditor seeking precautionary retention does not necessarily have to establish the risk relating to bank deposits in exactly the same way as for other types of assets.
Article 1175 complements this rule. When the assets consist of cash, deposits with credit institutions or other fungible property, the applicant is not subject to the ordinary requirement of separately explaining the reasons for fearing that those assets will be disposed of, concealed or dissipated.
The creditor must still satisfy the other applicable requirements for the precautionary measure.
The existence of a bank account therefore does not automatically entitle a creditor to freeze it. Rather, the Commercial Code modifies how one of the risk elements is treated because of the nature of the asset.
A bank-account freeze is not the same as an enforcement attachment
It is important to distinguish precautionary retention from the attachment that may occur as part of a commercial enforcement proceeding.
The Mexican Supreme Court addressed this distinction in binding precedent 1a./J. 48/2023 (11a.), digital record 2026431.
The Court concluded that precautionary retention under Article 1168 may operate in a commercial enforcement proceeding independently of attachment because the two mechanisms perform different functions.
Precautionary retention is directed at preserving assets that might otherwise cease to be available. Attachment operates within the enforcement mechanism applicable to the creditor’s enforceable title.
This distinction is examined in more detail in our article on precautionary retention and attachment in Mexico.
For bank accounts, however, identifying the nature of the measure is only the first step. A second question arises once the court has granted or denied the precautionary measure: how can that decision be challenged?
Recent Mexican jurisprudence makes the type of proceeding crucial to answering that question.
The 2025 rule on challenges in oral commercial proceedings did not remain the final position
In February 2025, jurisprudence PR.A.C.CS. J/15 C (11a.), digital record 2029969, addressed precautionary measures in juicio oral mercantil, or oral commercial proceedings.
The Regional Plenary in Administrative and Civil Matters of the Central-South Region concluded that decisions granting or denying precautionary measures in oral commercial proceedings were subject to the ordinary remedies provided by the Commercial Code.
The reasoning was based in part on the relationship between the rules governing precautionary measures and the general rule of non-appealability applicable within oral commercial proceedings.
Under that 2025 interpretation, the precautionary proceeding was treated as sufficiently distinct from the main oral proceeding for the ordinary remedies applicable to precautionary measures to remain available.
That position became the subject of Contradiction of Criteria 272/2025.
The Supreme Court resolved that contradiction on 11 March 2026.
The Supreme Court changed the rule for oral commercial proceedings in 2026
The Supreme Court sitting in Plenary reached a different conclusion in Contradiction of Criteria 272/2025.
The resulting jurisprudential rule, P./J. 148/2026 (12a.), states that decisions granting or denying precautionary measures in an oral commercial proceeding may be challenged through amparo indirecto.
The Court examined Articles 1183 and 1345, section IV, of the Commercial Code, which generally contemplate appeal against decisions concerning precautionary measures when the amount or interest in dispute permits an appeal.
But the Court also considered Article 1390 Bis.
That provision establishes the special rule that ordinary appeals are not available in juicio oral mercantil. According to the Supreme Court’s 2026 interpretation, this rule also applies to decisions concerning precautionary measures within that type of proceeding.
Consequently, the affected party is not required to exhaust an ordinary appeal before seeking constitutional review through amparo indirecto.
This is a material change from the regional jurisprudence published in 2025.
For practical purposes, relying only on the earlier PR.A.C.CS. J/15 C (11a.) rule can therefore produce the wrong procedural strategy for a precautionary measure issued in an oral commercial proceeding.
But the 2026 rule is not universal for every bank-account retention
The fact that amparo indirecto may be pursued directly against a precautionary-measure decision in an oral commercial proceeding does not mean that the same procedural route applies to every precautionary retention of a bank account in Mexico.
A separate 2026 jurisprudential development illustrates the distinction.
Jurisprudence PR.A.C.CS. J/2 C (12a.), digital record 2032012, concerns precautionary retention of bank accounts ordered in a juicio ejecutivo mercantil de cuantía menor — a lower-value commercial enforcement proceeding.
In that procedural context, the rule is different.
Before filing an amparo indirecto against the precautionary retention of bank accounts, the affected party must first exhaust the recurso de revocación, or revocation remedy.
The reasoning is based on the principle of definitiveness applicable to constitutional proceedings.
Articles 1183 and 1345, section IV, of the Commercial Code provide for appeal against decisions concerning precautionary measures when the value of the case permits an appeal. When the amount is insufficient for an appeal, the Commercial Code’s rules on revocation become relevant.
The 2026 jurisprudence therefore requires the revocation remedy to be exhausted before the affected party proceeds to amparo indirecto in this particular lower-value commercial enforcement context.
This distinction matters because two cases can involve what appears commercially to be the same event — funds in a bank account being restrained — while the correct challenge route differs because the underlying proceedings are different.
The procedural route matters as much as the asset being frozen
A creditor or debtor should therefore avoid treating “freezing a Mexican bank account” as a single procedural category.
At least four questions should be separated.
First, what is the legal nature of the measure? It may be precautionary retention rather than an enforcement attachment.
Second, when was the measure requested? A precautionary measure may be sought before the principal proceeding or after it has begun.
Third, what type of commercial proceeding is involved? An oral commercial proceeding and a lower-value commercial enforcement proceeding do not necessarily have the same rules for challenging precautionary decisions.
Fourth, does the Commercial Code provide an ordinary remedy that must be exhausted before amparo? The answer can determine whether an immediate constitutional challenge is procedurally available.
This is why the procedural classification of the case should be established before selecting a remedy.
What should a creditor prepare before seeking retention of bank funds?
For a creditor, obtaining a precautionary measure against bank funds should not begin with the assumption that the court will automatically freeze an account simply because a debt remains unpaid.
The application should be prepared around the statutory requirements.
Depending on the circumstances, the creditor should assess:
- whether the commercial claim is liquid and enforceable;
- the amount for which protection is sought;
- whether the assets to be retained can be identified with sufficient precision;
- whether the target consists of cash, bank deposits or other fungible assets subject to the statutory treatment of risk;
- which other requirements under Article 1175 apply to the particular claim;
- what security may be required from the applicant for potential damages caused by the precautionary measure;
- whether the principal claim is ready to be filed within the applicable period if the measure is sought before the proceeding begins;
- which type of commercial proceeding will ultimately govern the dispute.
These questions should form part of the broader strategy for debt collection in Mexico, particularly when the creditor has identified liquid assets but is concerned that they may no longer be available by the time ordinary enforcement reaches them.
What should the affected party check before challenging the measure?
For the party whose funds have been retained, speed is equally important.
The first step should not be to assume that every bank-account retention can immediately be challenged through the same remedy.
The procedural file should be reviewed to determine:
- whether the order is a precautionary measure or an enforcement measure;
- whether it was issued before or during the principal proceeding;
- whether the underlying case is a juicio oral mercantil, a juicio ejecutivo mercantil or another form of commercial proceeding;
- whether the value of the dispute affects the availability of an appeal;
- whether a revocation remedy is available and must be exhausted;
- whether the applicable jurisprudence permits direct amparo indirecto;
- when the affected party became legally aware of the measure and which procedural deadlines have begun to run.
The distinction between the Supreme Court’s 2026 rule for oral commercial proceedings and the separate 2026 rule for lower-value commercial enforcement proceedings is especially important.
In an oral commercial proceeding, the Supreme Court has determined that decisions granting or denying precautionary measures may proceed to amparo indirecto without first exhausting an ordinary appeal.
For precautionary retention of bank accounts in a lower-value commercial enforcement proceeding, however, the applicable jurisprudence requires the revocation remedy to be exhausted before amparo indirecto.
The label “bank-account freeze” therefore does not determine the remedy by itself.
The type of proceeding does.
A Mexican court may, when the statutory conditions are met, preserve bank funds without first hearing the debtor. But what happens next depends on the procedural setting in which the measure was issued.
For creditors, the central issue is whether the funds can be preserved before they disappear from the reach of future enforcement.
For the affected party, the central issue is identifying the correct and timely procedural route for challenging the measure.
The 2026 jurisprudence makes one point particularly clear: before challenging a precautionary measure involving a Mexican bank account, the underlying commercial procedure must be identified correctly.
