SAT seeks to reduce digital seal lockouts and give taxpayers more time to get compliant in 2026
The tax authority is adjusting its processes so canceling digital seals is a last resort and doesn’t disrupt operations for compliant companies.
Mexico’s Tax Administration Service (SAT) is shaping a significant change in how it applies one of the most sensitive measures for businesses: restricting or canceling Digital Seal Certificates, which are essential to stamp invoices and issue payroll. For 2026, the authority estimates that the number of seals permanently canceled will drop to no more than 3,000, down from the 18,000 recorded the prior year, according to remarks by Gari Flores, SAT’s General Administrator of Revenue Collection, to members of the Mexican Institute of Public Accountants.
The shift responds to a dual objective: maintain enforcement tools against illegal practices—particularly the invoicing of simulated transactions—while also reducing the economic impact that a lockout can cause for companies with real operations, especially in sectors where cash flow depends on daily invoicing. In the context of Plan México, the official intent is for seal restrictions to be a measure of last resort, paired with prior preventive and corrective actions, as well as faster service channels to help taxpayers get back into compliance.
Operationally, the planned approach is to prioritize communication and correction before reaching a lockout. This includes safeguarding due process (the right to be heard) in applicable cases and, when there is a temporary restriction, enabling channels so the taxpayer can address findings with lower administrative and financial costs. In practice, the adjustment aims to avoid abrupt suspensions that paralyze the issuance of CFDIs (digital tax invoices), a critical component of compliance and of the commercial relationship between companies and their customers.
The discussion comes at a time of heightened regulatory sensitivity. In 2026, businesses have paid closer attention to changes to the Federal Fiscal Code aimed at toughening the fight against evasion schemes linked to issuers of invoices for non-existent transactions. For the private sector, the challenge has been balancing enforcement with operational certainty: a seal restriction doesn’t only affect the noncompliant party—it can also break the payment chain when it hits suppliers, small and mid-sized businesses, or companies that are still in the process of clarifying issues with the authority.
In addition, SAT extended the time that can elapse from the first requests or communications to the point of restriction, moving from roughly eight months to a window of up to 18 months, according to the authority. This expanded runway is meant to give taxpayers more time to respond and correct discrepancies so the outcome isn’t an automatic lockout—so long as they pay attention to notices and show a willingness to become compliant.
The Taxpayer Mailbox and the economic cost of ignoring notices
Accountants and tax specialists stress that the main friction point is often less legal than operational: day-to-day handling of notifications. The Taxpayer Mailbox (Buzón Tributario) has become the central channel for communicating administrative actions and the start of audit powers, and deadlines run even if the taxpayer never opens the message. In an environment where formality depends on digital receipts and where a seal suspension prevents invoicing, weak internal controls over who receives, categorizes, and responds to requests can turn into a liquidity shock. For companies with payroll-heavy operations or tight supply chains, the risk isn’t just a fine—it’s the inability to collect, pay, and document transactions.
From a macroeconomic perspective, the issue goes beyond tax administration. Mexico remains an economy deeply integrated into manufacturing and services supply chains, with thousands of companies that depend on fast billing and payment cycles. In that context, reducing permanent lockouts could help ease friction in productive activity, especially for small and mid-sized businesses, without giving up enforcement. At the same time, the success of the approach will depend on SAT’s ability to implement clear rules and consistent internal processes, including uniform criteria to distinguish between real risks of simulated transactions and discrepancies stemming from errors, backlogs, or incomplete documentation.
The challenge for the authority is a delicate one: a more flexible framework can boost cooperation and voluntary compliance if it is seen as predictable and backed by effective correction pathways, but it also requires controls to keep it from becoming an opening for undue delays. In the coming months, it will be important to see how these changes are reflected in miscellaneous tax rules, response times, and service mechanisms—and whether the promised reduction in permanent cancellations translates into fewer disruptions to day-to-day business operations.
Overall, SAT’s strategy aims to reduce the economic impact of digital seal lockouts through longer timelines, prevention, and faster regularization, while maintaining pressure against fraudulent invoicing schemes; the outcome will depend on execution and on taxpayers addressing their notifications promptly.
