Tax Litigation and Appealable Acts: Analysis of Cassation Order No. 15941 of 2025

Tax law is an area where procedural clarity and regulatory certainty are essential for taxpayer protection. Often, the distinction between what is appealable and what is not can generate uncertainty. Cassation Order No. 15941 of June 14, 2025, from the Court of Cassation provides fundamental clarification regarding the nature and scope of appealable acts in tax litigation, offering valuable guidance on the interpretation of Article 19 of Legislative Decree No. 546 of 1992.

The Exhaustive List of Appealable Acts: Art. 19 Leg. Dec. 546/1992

Article 19 of Leg. Dec. 546/1992 specifically lists the acts against which a taxpayer can file an appeal. This list is traditionally considered "exhaustive," meaning it is comprehensive and aims to ensure legal certainty. However, case law has developed an interpretation that, while safeguarding the principle, introduces flexibility in favor of taxpayer protection. Order No. 15941/2025, presided over by Dr. V. L. and reported by Dr. M. M. F., analyzes the case of M. A. v. A. G. S., rejecting the appeal and providing a key interpretation on the scope of Article 19.

In matters of tax litigation, the exhaustive nature of the list of appealable acts contained in Article 19 of Leg. Dec. No. 546 of 1992 does not preclude the taxpayer from appealing acts that, by explicitly stating the concrete factual and legal grounds, bring a well-defined tax claim to their attention, without its non-exercise leading to the non-appealability of the same claim subsequently reiterated in one of the typical acts provided for by the aforementioned Article 19. (In this case, the Supreme Court affirmed that the informal notice of default concerning the AGCM support contribution, as it was not included in the list under Article 19 of Leg. Dec. No. 546 of 1992 and lacked the characteristics of a formal demand, although appealable, did not need to be appealed under penalty of inadmissibility, thus the taxpayer was free to appeal directly against the subsequent payment notice).

The Court of Cassation clarifies that, although the list in Article 19 is exhaustive, taxpayers can appeal non-typical acts that manifest a clear tax claim. Crucially, failing to appeal an "atypical" act does not preclude the right to appeal the same claim if it is re-proposed in a "typical" act, such as a payment notice. This means that taxpayers are not obligated to act immediately against every preliminary communication but can await the formal act without losing their right to defense.

The Broad Interpretation and the Case of the Informal Notice

The case examined by the Supreme Court concerned an "informal notice of default" related to an AGCM contribution. The Court ruled that, despite not being on the list in Article 19 of Leg. Dec. No. 546/1992 and lacking formal demand characteristics, such a notice was appealable. However, it was not mandatory to appeal it under penalty of inadmissibility. The taxpayer, M. A., therefore had the option to appeal directly against the subsequent payment notice. This principle is fundamental as it prevents preliminary communications from forcing citizens into premature litigation. The Court of Cassation recognizes the taxpayer's freedom to choose the most opportune moment to defend themselves, provided the claim is crystallized in a formal and typical act.

The key points of this interpretation are:

• The list of appealable acts under Article 19 of Leg. Dec. No. 546/1992 is exhaustive but subject to broad interpretation.
• Acts not expressly provided for are also appealable, provided they reveal a clear tax claim.
• Failure to appeal an "atypical" act does not prevent the appeal of the same claim if it is re-proposed in a "typical" act.
• The taxpayer has the option, not the obligation, to appeal atypical acts that reveal a tax claim.

Conclusions: Taxpayer Protection in Tax Law

Order No. 15941 of 2025 is part of a line of case law that balances legal certainty and taxpayer protection. It values the right to defense by preventing excessive formalism from jeopardizing the possibility of contesting a tax claim. The decision provides reassurance: taxpayers are not bound by every informal communication but can await the definitive act to take legal action. For professionals and taxpayers, it is essential to carefully evaluate every communication, but it is equally crucial to know that the right of appeal remains steadfast. For proper management of tax litigation, it is always advisable to consult legal experts.