letter of authority meaning in English

授权书
授权证书委托证书
委托拨款证

If the applicant is not the manufacturer , please attach a letter of authority from the manufacturer to allow audit to take place
如果申请人不是生产商，请附上生产商的授权书允许审计工作的进行。
The licensor shall use its best efforts to assist the licensee in any action , including but not limited to execution of and delivery to the licensee to the satisfaction of the licensee all legal documents ( such as letter of authority , evidence of ownership etc ) as required by the relevant jurisdictions
在任何诉讼中，许可方应尽力协助被许可方，包括但不限于对按照有关管辖权所必要的所有法律文件(诸如授权书，所有权凭证等)的令被许可方满意的签署和递送。