We rely on Travisa.com to provide our clients assistance with all types of passport applications: new us passport, passport renewal, lost passport, child passport, or applying for second US passport.
http://www.travisa.com/
Argentina visa for US and Canadian residents:
http://argentina.travisa.com/
https://virtual.provinciapagos.com.ar/ArgentineTaxes/
Chile Visa waiver for Chilean citizens visiting the US:
https://www.official-esta.com/visa-waiver-program/esta-for-chilean-citizens