Genuine Secondment and Training: Supreme Court Rules

The Case and Regulatory Context

This litigation arises from a challenge brought by a company against a penalty notice issued by the Territorial Labor Inspectorate. The inspection had classified a series of employee secondments as unlawful, deeming them to be unauthorized labor supply. Specifically, the host company had received workers from the seconding employer formally for training and professional development purposes.

Secondment, governed by Article 30 of Legislative Decree no. 276 of 2003, requires an employer to temporarily place one or more workers at another entity's disposal to perform specific activities. A structural and mandatory element of this arrangement is that the secondment must serve a specific, relevant, and long-term interest of the seconding employer, who must retain ownership of the employment relationship along with managerial and economic direction. Conversely, when an operation merely supplies labor to a third party without an independent entrepreneurial interest by the seconding employer, it constitutes unlawful labor mediation, subject to administrative and civil penalties.

The Legal Issue Examined

The Supreme Court was called upon to clarify the application boundaries of "training" secondments, verifying which factual and evidentiary elements distinguish a genuine training requirement—attributable to the seconding party's interest—from disguised fraudulent labor supply. In particular, the legitimacy judges examined the compatibility between the worker's organic integration into the host entity's structure and the genuineness of the arrangement, evaluating the symptomatic value of indicators such as the lack of a structured training program, the absence of a causal link with the seconding party's contracts, and the payment of fees exceeding the mere cost of labor.

The core issue was whether a mere declaration of training intent suffices to legitimize sending personnel to third parties,or whether the inspection authority could base a finding of illegality on an overall assessment of the actual execution of the work.

The Court’s Decision and Principle of Law

By order no. 26009 of September 30, 2026, the Supreme Court of Cassation dismissed the company's appeal, confirming the unlawfulness of the secondments. The judges reaffirmed the centrality of the ratio decidendi grounded in the causal requirement: seconding is genuine only if it serves a specific interest of the seconding employer.

The ruling establishes the principle that, in training secondments, the worker's integration into the host organization and receipt of instructions from the latter are compatible with the law solely if supported by a real training project tied to the seconding party's interest. Symptoms indicating that a secondment is not genuine include:

• the absence of a concrete, documented training program;
• the lack of any connection between the subsequent supply contracts indicated as the outlet of the secondment and the seconding party;
• the factual coincidence of the seconded worker's performance with that of the user's regular employees;
• the designation of the host's premises as the stable workplace in individual employment contracts;
• the worker's direct job search with the host entity; and
• the agreement on or payment of fees exceeding the mere cost of labor, especially if "adjusted" only after an inspection begins.

Operational and Practical Implications

This ruling is of primary importance for companies and professionals advising businesses in labor law matters, as it mandates strict prior control over secondment agreements. The decision highlights that the formal qualification of a transaction cannot be set up against supervisory bodies if practical management refutes the existence of an independent,current business interest of the seconding party.

For businesses, this means that secondments—especially those motivated by training needs—must be supported by rigorous documentation: analytical training programs, traceability of economic flows limited to the reimbursement of actual costs, and consistency between the duration of the assignment and the achievement of stated training objectives.The practice of using secondments as a tool for workforce flexibility or as a preliminary step for stable placement with third parties, absent statutory requirements, exposes companies to significant administrative and financial penalties.