Tax Litigation

The "Gianfilippo Cattelan Firm" provides specialised advice on tax matters and assistance in tax litigation in constant coordination with the lawyer Antonino Provito.

Studio Del Piero Sirch Associati


Gianfilippo Cattelan
Founding member | Linkedin

Graduated from the University of Trieste, after a master's degree in tax law and a long collaboration with leading national tax offices, he began his career in Udine in 1995. Since 1999, he founded the Firm together with Michela Del Piero and Lorenzo Sirch. He is also a member of an associate professional firm based in Bologna. For many years, he has carried out an intense activity of publishing articles on qualified tax law magazines and has collaborated in the preparation of manuals and commentaries published by specialised editors. He has taken part as a speaker at conferences and courses on tax matters, organised by national magazines and professional and trade associations. He was a lecturer at the Superior School of Economics and Finance and at tributaries and labour law masters organised by well-known training schools. From 2006 to 2013, he was statutory auditor of a local Banca Popolare, still operating. He has held and holds the position of statutory auditor in leading industrial and financial companies, including listed companies. He is also specialised in tax advice, pre-litigation and tax litigation.

Antonino Provito

Graduated from the University of Palermo, in 1988, he attended and passed the competition course of the Superior School of Public Administration and served as a tax official from 1991 to 1997. In 1992, he obtained the qualification to the profession of lawyer at the Court of Appeal of Palermo and since 1998, he is registered with the Order of Lawyers of Udine. He continuously publishes articles and is a speaker at conferences and courses on tax matters. Since 1998, he has worked with Gianfilippo Cattelan and he is specialised in consulting on tax matters and tax litigation.

Sara Simeone

Graduated from the University of Udine in Law with a thesis on Commercial and Advanced Industrial Law, in 2012, she obtained the qualification of lawyer. Since 2012, she has been collaborating with Gianfilippo Cattelan and Antonino Provito in the activity of consulting on tax matters and tax litigation.



Assistance and prior advice to the possible establishment of the tax process.


Tax disputes with respect to the Revenue Agency, the Ministry of Finance, Local Authorities or Agents of the Collection Service in the various phases of the recourse, of the eventual appeal and of the recourse to the Court of Cassation.


Assistance and advice in the preparation of the proposal for partial payment of taxes administered by tax agencies.