Re: Arlean:
When you opened your bank account, BROU likely asked you for a "certificacion de ingresos" (document proving the funds you'll receive are legit, etc.).
When I opened mine, it was OK to provide only Purchase orders from my clients, but otherwise, it's needed to ask an Escribano publico to write such a document.
I'm just wondering what would happen if I don't give this document this year... (it has to be submitted annually)