A Double Tax Treaty (DTT) is a bilateral agreement between two countries which has as its’ main purpose the avoidance of double taxation on the same benefit and/or profits. Although DTTs are part of the International Public Law, as they govern the relations between two countries, they affect directly the physical persons who are either holders of a double citizenship or reside in one country and/or produce income in the other country. More concretely, this type of agreements are designed for the protection of both governments’ taxation rights, in terms of the avoidance of tax evasion, as well as the citizens’ rights, as physical persons and private legal entities are secured before the potential risk of double taxation on the same taxable income.