双挂号 meaning in Chinese

registered with advice of receipt (ar)

Delivery by double registered airmail
以双挂号空邮递送
Delivery by double registered air mail
以双挂号空邮派递
Delivery by double registered airmail
以双挂号空邮递送
If you submit your application through a chinese diplomatic and consular mission overseas , your passport will be delivered to that chinese diplomatic and consular mission by double registered airmail or express despatch service
如果你是透过中国驻外国的使领馆递交申请，你的护照将以双挂号空邮或速递服务寄往有关中国驻外国的使领馆。