By: Georgina Herrera Guerrero
Payroll is not merely an administrative matter: it is evidence. In labor litigation, that distinction can completely change the cost of a contingency. Isolated thesis XVII.3o.C.T.1 L (12th), digital registry 2032254, published on June 12, 2026, sends a very clear signal to employers: if a worker claims to have received part of their wages off payroll, the burden of proving the wage and its amount still rests with the employer.
The criterion is relevant not only for building a defense in litigation, but also for reviewing how companies actually run their payroll in practice. There are cases in which, out of habit, financial pressure, or internal decisions, payments are split apart, compensation is labeled as “support” or allowances, amounts are routed through third parties, or items are handled that do not appear in full on payroll receipts or CFDIs. The problem is that, when the reality of the payment does not match the formal documentation, the contingency does not arise with the lawsuit: it already exists in day-to-day operations. In labor matters, courts may look beyond the receipt and apply the principle of primacy of reality: what was actually paid and how it was paid is what matters, not only what the paperwork says.
For a company, the delicate point is that the worker need not provide perfect or irrefutable proof of a dual payroll. The worker can offer indicia: messages, transfers, witnesses, payment patterns, internal instructions, or any element that makes it plausible that the actual wage differed from the one declared. Against that, simply denying the facts or maintaining that the CFDI reflects all income may be insufficient if the company lacks a complete and consistent documentary record.
The reading for businesses should not be defensive, but preventive. Where there are bonuses, commissions, compensation, allowances, productivity payments, or extraordinary items, it is worth reviewing whether they are truly exceptional or whether, in practice, they form part of ordinary remuneration. It should also be checked that contracts, receipts, CFDIs, internal policies, and bank statements all tell the same story. When each document says something different, the file becomes vulnerable.
The recommendation for the Human Resources, Finance, and Legal functions is to conduct a payroll audit with an evidentiary focus. This is not only about tax compliance, but about being able to explain, with documents, how the wage is composed, who authorizes each item, how often it is paid, and for what reason. Where there are inherited practices or informal payments, the right approach is to quantify the risk, regularize gradually, and handle communication with staff carefully. Changing labels does not eliminate a contingency if the underlying reality stays the same.
This thesis also serves as a reminder of something companies sometimes forget: the burden of proof in labor matters is designed to offset the asymmetry between employer and worker. The company administers payroll, retains the information, issues the receipts, and decides the payment mechanisms. For that reason, if the dispute reaches litigation, the company is expected to be able to demonstrate, in an orderly manner, what the actual wage was and how it was paid.
The conclusion is this: a transparent payroll protects the company, and documenting wages properly is not bureaucracy; it is a control measure for labor, tax, social security, and reputational risk. In times of heightened judicial scrutiny, paying correctly and proving even better can be the difference between a solid defense and a costly contingency.
Source: Thesis XVII.3o.C.T.1 L (12th), digital registry 2032254, Semanario Judicial de la Federación.
