Argentine nationality law regulates the manner in which one acquires, or is eligible to acquire, Argentine nationality. Nationality, as used in international law, describes the legal methods by which a person obtains a national identity and formal membership in a nation. Citizenship refers to the relationship between a nation and a national, after membership has been attained. Argentina recognizes a dual system accepting Jus soli and Jus sanguinis for the acquisition of nationality by birth and allows foreign persons to naturalize. Recent changes by the Decree DNU 366 / 2025 have tightened the requirement to get citizenship, but allowing investment methods.