UMICH申请界面的certifile是什么意思？

今天在umich的applyweb申请界面上发现有个certifile，似乎是让上传成绩单。大家遇到这种情况了吗？

贴一下小秘的邮件

Certifile is not a requirement. It is an option for submitting official academic records to the Rackham Graduate School via an evaluation agency called Evaluation Perspectives.  A fee is required.  You can inquire further about the purpose of the mailing address if you wish to use this option, which is not required at the time of application.

You also have the option of uploading copies of your official academic records with the application itself.

那个是optional的，大S也有，应该不用管

我也看到了这个，不知道是什么情况，是传成绩单吗