Iran's banks were recently cut off from the international "SWIFT" club, making it virtually impossible to transfer money to Iran from a foreign bank.

最近，伊朗国内的银行被踢出了环球同业银行金融电讯协会（SWIFT）组织，要从外国银行向伊朗汇钱几乎已是不可能。

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Payment: You can notify the "ZWW Chinese and foreign net " signatures received the payments can be made by bank transfer;

付款方式：可通知“ZWW中外网”签字领款，也可通过银行转帐；

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And in some cases a bank decides on its own to hold on to a transfer in the hope of getting a better foreign-exchange rate for the customer the following day, or in order to batch it with other transfers and so lower its costs.

ECONOMIST: Banking