Diana Piatti Lobo


+ 55 61 2155-5574
Area of practice

Lobo is specialist in tax disputes, engaging activities before administrative and judicial courts in the defense of the taxpayers’ interests in several tax matters. Her practice encompasses the definition of strategy, drafting and conducting litigations and offering administrative defenses on a range of tax subjects (state tax benefit, transfer price, Social Integration Program – PIS and Tax for Social Security Financing – COFINS credits, and social security contribution). She further develops activities related to tax consultancy, mainly drafting memorandums to respond to questionings on the application of the federal, state and municipal legislations. Her experience in foreign law firm reinforces her knowledge in the field of International Tax Law, above all in the application of treaties to avoid double taxation. Lobo has previous experience in the areas of knowledge of industries (pneumatics, food, chemicals, pharmaceutical), trade (retail and wholesale), and informatics.


Brazilian Bar Association.
Instituto Brasileiro de Direito Tributário (IBDT).


Université Paris 1 Sorbonne, France. Master’s degree in Tax Law, 2012.
Instituto Brasileiro de Direito Tributário (IBDT).
Specialization course in International Tax Law, 2009.
Escola de Direito de São Paulo of Fundação Getulio Vargas.
Specialization course in Tax Law, 2006.
Law School of Universidade Federal de Alagoas. Bachelor of Laws, 2003.

Office experience abroad

Attorney at the law firm CMS Francis Lefebvre, Paris, France (2012).

Recent publications

ME Ordinance No. 340, published on October 9, regulated the functioning of the Judicial Delegations...[+]
After a long period of discussion and debate, this year the federal government enacted Law...[+]
With their publication in the Official Federal Gazette last September 10, 33 precedents approved...[+]
Law No. 13,655/2018, published in early 2018, included new general principles in the Law of...[+]
At the end of last year, Justice Dias Toffoli released for judgment Extraordinary Appeal No....[+]
The 2nd Panel of the Federal Supreme Court (STF) recognized the unconstitutionality of the...[+]
Last year was special for the Administrative Council of Tax Appeals (Carf). The period began...[+]