AND ONE SET OF SHIPPING DOCUMENTS HAS BEEN SENT TO XXX BY EXPRESS COURIER SERVICE ONLY AND ITS RELEVANT COURIER SERVICE RECEPT MUST BE ATTACHED TO THIS CERTIFICATE.

• 这句是不是说一整套单据的副本用邮寄的方式给XXX公司，邮寄回单要附加在这份受益人证明上面。那是将单号写上面还是要把邮寄回单复印件一起交到银行？