Based off my experience, you'll need to make an appointment online for the Registry (I believe its on Yrigoyen) and go with a Certificado de Domicilio - which you can get by going to the Comisaria which corresponds to your address - and pay a minimal fee.
Hi expats! My name is Evan, and I work with Mate Club de Conversación. Together with the U.S. Embassy in Argentina and the Instituto Cultural Argentino Norteamericano (ICANA) we're organizing the Buenos Aires Book Swap & Bilingual Poetry Slam, on Friday, February 23rd from 6 to 8 pm, in the...