If this is technically "not a visa" what is it. For example if like some of us we have the resident visa but are U.S. citizens do we pay an entry fee each time we enter or continue with the visa we have... TO make it more complicated what if you are dual citizen of U.S. and european country but your Argentina visa is in your U.S. passport. THe easy answer is that you can enter with euro passport but will not have stamp or entry on Argentine visa so you will have hard time renewing it and proving that you were there for renewal and other reasons