请高人帮我写下面这个英文信件要求的授权文件

请高人帮我写下面这个英文信件要求的授权文件
我想托人从国外代我取回一份文件，结果他们说需要我发个如下要求的传真过去，这个应该怎么写啊请帮帮我 we will need a letter from **** authorizing you to access his file. The letter needs to state that the student, is authorizing you (name and relation) to access his SFU student file. The document needs to be dated and signed by the student. Please make sure to include a student number as well. You can fax the document to my attention at the fax number provided below.