Transferring money internationally can be complicated and costly. However, the most reliable way is to go through a casa de cambio (exchange house), as they handle these transactions routinely, or Western Union. The most reliable casa de cambio in Argentina is Banco Piano, with the usual fee being around 2% of the amount you are transferring. Be sure to ask what the rate is first, as the fee can change from time to time. The banks will tend to charge you a lot more money to do the same transfer, so ask before you start the transaction.
The government has no regulations governing the movement of funds into or out of the country. Each institution, however, sets its own limit on transfers. At Western Union, a maximum of US$7,500 per day can be sent out of or received into the country.
You will need your passport or DNI, and in order to send money be prepared with the receiving and sending bank accounts’ routing and account numbers, as well as their addresses.