noun
foreign postal money order
A financial instrument issued by a post office for sending money abroad. This term is specific to postal services and may be less common in everyday conversation.
外国郵便為替で送金する方法を教えてください。
Please tell me how to send money using a foreign postal money order.
Compound of 外国 (foreign country), 郵便 (postal service), and 為替 (money order). The term directly describes its function.