Greetings:
I wish to exchange USD for ARS at the Blue Rate.  
My  debit card issuers are willing to accept deposits in ARS. 
You shall assume no risk.  I shall transmit USD to you.  I shall assume all  risk.
My plan:  I exchange $50.00 USD for the equivalent amount of ARS at the Blue Rate.  Next, I shall transmit the ARS to you using Western Union.  You retrieve the ARS at the nearest Western Union office.
You transfer ARS at the Blue Rate to my Western Union debit card account( this shall be furnished).  I shall exchange at the Official rate.  Half of the profits shall be remitted to you or we can continue to exchange USD for ARS.
If we continue to exchange, we will accumulate $1.6Million USD in fifteen(15) trades.
A Spanish language version of this letter is shown below.
Contact me.

David O'Keefe
do999967@gmail.com

Saludos:
Deseo cambiar USD por ARS a la Tarifa Blue.
El emisor de mi tarjeta de débito está dispuesto a aceptar depósitos en ARS.
No asumirá ningún riesgo. Te transmitir