8 May 2019 After every attempt to get further information from Immigraciones about an appointment, having finalized the Radex application, and encountering a wall of silence I decided to act on a discovery I'd made at Immigraciones. After two different hours long waits in the main building trying to get information at "Informes" I discovered by accident there's is a separate building that handles Ex-Mercosur application appointments. It is Edificio 6, deeper in the property. Lines are short, signage is good.
It is the place you would go for an appointment to progress your application. However they are willing to talk to you without an appointment. Once inside I was recommended to go to the "D" section with my questions. No one leapt out to ask why I was standing there so I asked through the glass, someone pointed me to another person and, in Spanish, I explained my situation (had been notified the Radex application was finalized) and urgency ( needing a Precaria asap). People seem kind and understanding here and willing to help. A woman looked up my case, discovered it was delayed, awaiting an apostilled document proving income. She produced an example of the document I needed to provide to move my case forward and invited me to return with it and all my original documents when I had it. She will process my case.
The income document required is a proof of pension.
I'm on a US passport. To get an apostilled Benefits letter from the US I was quoted U$295 plus exorbitant shipping costs, hundreds of dollars, by a company that offers their express service online. However, courtesy of Steve bsas here on BAExpats, who informed me that the U.S. Embassy can produce a Social Security benefits letter in Spanish, I was able to get the letter through an appointment at no charge from the U.S. Embassy and because it's considered here a domestic document, it can be apostilled here for a fee.
There is a government office that schedules appointments for apostille
https://www.cancilleria.gob.ar/es/legalizaciones-y-apostilla-en-el-pais . Getting an appointment make take weeks or days. There is a calendar of available dates. I am working through an escribano. Hopefully he is connected. I am now waiting the apostilled document so I can return to Edificio 6, Section D.