Double‑employment and infidelity investigations in Milan.

The Italian legal system does not, in principle, prohibit a worker from undertaking a second economic activity. However, case law and collective bargaining set insurmountable limits to protect the primary employer. A second job must never conflict with duties of loyalty, non‑competition, and occupational health and safety. When these parameters are breached, the company suffers direct harm that justifies the imposition of severe disciplinary sanctions.

Arcadia Company supports human‑resources management and corporate legal counsel in identifying and documenting cases of unauthorized or illicit double employment. Through field investigations and targeted document checks, we gather forensic‑grade evidence essential to terminate the employment contract for cause and protect the operational integrity of the business.

The three profiles of corporate damage linked to double employment

The illicit exercise of a second job harms the primary corporate organization across several legal and economic dimensions:

• Unfair competition and breach of the duty of loyalty (Art. 2105 c.c.): occurs whenever the employee provides his work, even indirectly or gratuitously, to a competing company or uses the primary company's know‑how and confidential commercial information to divert clientele. This often overlaps with our Unfair competition and poaching.
• Impairment of performance and occupational safety: carrying out a demanding or night‑time second job (often undeclared) prevents the necessary recovery of the worker’s physical and mental energy. This leads to a sharp drop in daytime productivity and an exponential increase in the risk of workplace accidents, for which the primary employer could be held liable.
• Fraud when coinciding with sick leave or injury: performing work for third parties while absent for health reasons and receiving economic benefits constitutes fraud against both the employer and the social‑security agency (INPS), and is prosecutable criminally.

Regulatory limits in the private and public sectors

Arcadia Company’s investigative strategy varies according to the nature of the employment relationship of the subject under review, applying the appropriate legal parameters:

The private subordinate employment sector

In the private sector, in addition to complying with article 2105 of the Civil Code, it is necessary to verify adherence to the overall working‑time limits introduced by Legislative Decree No. 66/2003. The aggregation of multiple employment contracts (e.g., two part‑time contracts) may not push the average working time, overtime included, beyond 48 hours per week calculated over a four-month reference period and must guarantee the employee 11 consecutive hours of rest every 24 hours. Our protocol documents the continuity, stability, and actual schedule of the second activity to demonstrate breach of these statutory thresholds. A related line of work is Non‑compete violation.

The incompatibility regime in public employment

For personnel of the Public Administrations, the regulation set out in article 53 of Legislative Decree No. 165/2001 establishes a general principle of exclusivity of the employment relationship. Except for specific exceptions provided by law and with prior written authorisation from the employing administration, the performance of continuous commercial, industrial or professional activities is strictly prohibited. Breach of the exclusivity regime exposes the employee to the formal notice provided by art. 63 of Presidential Decree 3/1957 and, if the incompatibility is not removed within fifteen days, to forfeiture of employment, besides any referral to the Prosecutor’s Office of the Court of Auditors for fiscal damage.

Focus: school sector and teaching staff: The incompatibility regime for teachers and school personnel, regulated by article 508 of the Unified Text on Education (D.Lgs. No. 297/1994) and D.Lgs. No. 165/2001, prohibits the practice of commerce, industry, and the acceptance of stable public or private positions. Arcadia Company works continuously with private schools and administrations to verify the performance of undeclared continuous private tutoring, unauthorised consulting, or direct management of business activities incompatible with the teaching role.

Moonlighting: why companies find out late

Companies almost always discover moonlighting indirectly: an unexplained drop in performance, absences clustered on recurring days, a client reporting they met the employee elsewhere. When the second job is performed for a competitor, the breach of the duty of loyalty under art. 2105 of the Italian Civil Code is compounded by a concrete risk of know-how leakage.

The evidentiary value of the investigative dossier in court

In labour‑court disputes, mere confidential reports, corporate gossip, or unsubstantiated presumptions have no legal weight. To validate a dismissal for cause based on double employment, the employer must demonstrate with pinpoint accuracy the continuity of the external activity, the manner of its execution, and the overlapping hours.

The dossiers prepared by Arcadia Company contain:

• Detailed service notes with a chronological record of field‑observed activities.
• High‑resolution video‑photographic records compliant with current privacy laws, bearing certified date and time stamps.
• OSINT investigations and corporate due‑diligence checks aimed at identifying possible corporate shells, fictitious registrations to relatives or straw‑persons.

All collected elements are consolidated while ensuring absolute compliance with procedural rules. Moreover, our authorised investigators are available to support the corporate defence by testifying in hearings to attest to the facts described in the technical report. Our authorisations and certifications set out the framework we operate within.

A recurring case is that of the employee who works while on sick leave: in the dedicated guide on our blog we explain when monitoring is legitimate and what evidence is needed.