Mexico City — Mexico’s Tax Administration Service has begun using a new fast-track inspection procedure to investigate taxpayers suspected of issuing invoices for nonexistent or simulated transactions.
The measure is real, but descriptions of SAT conducting indiscriminate “house-to-house” searches with lawyers and special cameras exaggerate the scope of the reform.
Article 49 Bis of Mexico’s Federal Tax Code, known as the CFF, took effect January 1, 2026. It permits SAT to conduct an expedited visit when the agency has a stated reason to suspect that a taxpayer is issuing false digital tax receipts, or CFDIs.
This is not a general audit power allowing inspectors to enter any residence or business at random. The procedure must be directed at an identified taxpayer, supported by a written inspection order and based on a stated suspicion involving potentially false invoices.
The reform was published in the Official Gazette on November 7, 2025 as part of Mexico’s 2026 fiscal package.
Visits Are Limited To Suspected False CFDIs
The new process is specifically intended to determine whether invoices correspond to “existing, true operations or real legal acts.”
SAT may conduct the visit at:
- The taxpayer’s registered fiscal address
- Branches, offices or commercial premises
- Warehouses and storage facilities
- Fixed or semi-fixed street stalls
- A location where the invoiced activity occurred
- A place where the invoiced service was allegedly provided
A private residence could therefore be visited if the taxpayer has registered it as a fiscal domicile, operates a business there or allegedly performed the invoiced activity at that location. The law does not authorize SAT to search unrelated private homes simply to check whether residents are complying with tax obligations.
Mexican constitutional protections still apply. A tax visit is considered an official intrusion into a person’s private sphere and must be based on a written order issued by a competent authority. The order must identify the taxpayer, the place to be inspected, the purpose of the visit and the legal reasons supporting it.
Tax inspectors must also identify themselves and follow the applicable rules concerning witnesses and preparation of an official inspection record.
Inspectors May Record The Visit
One of the reform’s most controversial provisions allows SAT inspectors to begin taking photographs and recording audio or video when they arrive at the inspection site.
The order may be delivered to the taxpayer, a legal representative, the person managing the establishment or whoever is in charge at the time. That person must be informed when technological equipment is being used to document the proceedings.
Recordings could show whether a purported business has employees, inventory, equipment, offices or other physical evidence consistent with the activity described in its invoices. The material may be incorporated into the administrative file and considered when SAT issues its decision.
However, Article 49 Bis does not say that every inspection will include attorneys. Visits are conducted by authorized tax officials. A taxpayer may obtain legal or accounting assistance, but the statute does not create a special SAT team that must arrive accompanied by lawyers.
Procedure Can Be Completed In 24 Business Days
The accelerated timetable is one of the most important changes.
The inspection and decision must generally be completed within a maximum of 24 business days. By comparison, conventional tax audits can continue for considerably longer.
The process works as follows:
- SAT issues an order explaining why it suspects that the taxpayer’s CFDIs are false.
- When the order is delivered or formally notified, SAT suspends the taxpayer’s ability to issue invoices during the proceeding.
- Inspectors document the location and prepare a detailed record of what they observe.
- The taxpayer may submit evidence during the visit or within five business days to challenge the presumption.
- SAT then has 15 business days to issue and notify its decision.
If inspectors cannot locate the taxpayer, find that the registered address does not exist or are prevented from conducting the visit, SAT can document that fact and use the Tax Mailbox or public notices to continue the procedure.
The immediate suspension of invoicing can be especially serious for an operating business. A company unable to issue CFDIs may have difficulty collecting payments, delivering goods or maintaining commercial contracts while the review remains unresolved.
What Taxpayers May Need To Prove
The law requires invoices to represent genuine transactions, but it does not provide one universal checklist of supporting documents.
Depending on the transaction, evidence could include:
- Signed contracts and purchase orders
- Bank transfers and payment records
- Inventory entries and delivery receipts
- Photographs or reports showing completed work
- Employee and payroll records
- Transportation documents
- Emails and other business communications
- Machinery, equipment or facilities needed to perform the service
- Records identifying suppliers and customers
Accountants commonly describe these issues as “materiality” and “traceability.”
Materiality means demonstrating that the transaction actually occurred. For example, a company claiming to have purchased merchandise should be able to establish that the products existed, were delivered, entered its inventory and were later sold or used.
Traceability means being able to follow the transaction through its commercial chain, including who supplied the goods, when they were delivered, how payment was made and what subsequently happened to them.
Those terms are widely used in tax practice, but Article 49 Bis does not establish them as separately defined statutory tests. The legal question remains whether the CFDI supports a real transaction or legal act.
Consequences Extend To Customers And Suppliers
If the taxpayer successfully proves the transactions occurred, SAT must lift the invoicing suspension.
If the taxpayer fails to overcome the presumption, the CFDIs are considered false for general tax purposes. The transactions they describe are treated as having produced no valid fiscal effects.
SAT may then publish the taxpayer’s name and federal taxpayer registration number on its website and in the Official Gazette. The agency has already begun publishing notices under Article 49 Bis, confirming that the new procedure is being applied in practice.
Customers that used the affected invoices for deductions, value-added tax credits or other fiscal benefits then have 30 calendar days to reverse those effects by filing amended returns. Failure to do so can result in the temporary restriction of the customer’s own digital seal certificate, preventing it from issuing invoices.
Criminal proceedings are possible, but they are not automatic after every unfavorable inspection. Article 113 Bis of the Federal Tax Code establishes prison terms of two to nine years for issuing, selling, purchasing or acquiring invoices covering nonexistent or simulated operations. A criminal case requires a formal complaint from the Finance Ministry and must proceed separately through the criminal justice system.
The expedited inspection itself is an administrative procedure used to determine whether invoices are false. It is not a criminal raid, and the tax inspectors do not impose prison sentences.
What The Reform Means For Small Businesses
The new authority applies to individual taxpayers and companies of all sizes. It is not limited to large corporations or businesses already publicly identified as invoice sellers.
Small businesses, independent professionals and property owners who use a residential address as their registered fiscal domicile could be subject to a visit if SAT identifies specific reasons to suspect false invoicing.
The practical concern is therefore not that SAT will systematically inspect every home in Mexico. It is that targeted taxpayers may receive little advance warning, lose their ability to invoice immediately and have only five business days to organize evidence supporting their transactions.
Businesses should retain documentation showing that their purchases, sales and contracted services genuinely occurred. They should also verify their registered fiscal address, monitor their Tax Mailbox and maintain records connecting every significant CFDI to the corresponding contract, payment, delivery and completed work.
