You are right, you have to set the nationality of the receiver as Argentine, if it's a bank account to bank account transfer. That's what others and I have had to do. But if I am remembering correctly, someone posted here that that he did a transfer with a debit card and had to put in his correct nationality to get the transfer to go through. I'd say try it one way and if the system doesn't accept it, try it the other.Send less the first time. Start with say 300. When you set up the receiver details in WU make sure you set up citizenship as Argentina for the receiver account — even if they are not. You should not need to do any other verification.