Answer 1: When starting your business in Argentina, you can choose to establish a branch of a foreign company, take a holding in an existing company or create a new company.
Source: http://www.mrecic.gov.ar/es/inversiones-y-promocion-comercial.
Answer 2: Registration of commercial companies in Argentina does handled by the appropriate Public Commercial Register. In the case of the City of Buenos Aires, the organisation and activities of the Public Commercial Register are the responsibility of the General Inspectorate of the Courts (IGJ).
Source: http://www.mrecic.gov.ar/es/inversiones-y-promocion-comercial
Answer 3: According to the current rules of the BCRA (Central Bank of Argentina) it is NOT permitted to open accounts for NON-Residents.
Answer 4: Yes. The account will be denominated in $ arg (Argentine pesos). The commitment to the Bank will be established through the account opening, which will be implemented exclusively for operation in local currency.
Answer 5: Opening a special current account in dollars is only possible if the company has a previously opened account in Pesos ($ ARG).
Answer 6: YES. The Business Officer of the Branch/Office of Santander will verify the documentation received against the original documents and validate, on that single occasion, the signature of the account holders present in person by checking their data against the required documentation.
Answer 7: YES. According to the BCRA (Banco Central de la República Argentina) the proxy must be duly authorised by the relevant articles of association and have powers to operate the account. In turn, he must also have a tax identification key (CDI) and submit his identity document in Argentina.