授权书、自由销售证书，委托书，代理协议等都是出口越南申办使馆加签常见的文件。
出口企业如需申办授权书越南使馆加签,可通过我司代办，提供:授权书正本，营业执照复印件、委托书和印章声明-
授权书一般由出口商自行出具，基本格式为:
标题: LETTER OF AUTHORIZATION
To: -
This is to certify that XXX LIMITEDAddress at XXX, P.R.China,
has Authorized the XXX COMPANY Addressat XXX, Ha Noi City, Vietnam, Tel: XXX, Tax Code:XXX
To import, distribute and sellproducts of the XXX brand in Vietnam, independently and only toparticipate in bidding and supply our products
(according to theattached appendix) to the following units:
Micromax NS and Accessories (AMN 428E,AMN 414E, AMN 145, AMN 301)
ThisAuthorization is valid until May 31st, 2024.