UIUC ECE 要不要邮寄成绩单啊？

看研究生院写：You will only be asked to submit official or attested credentials (transcripts, academic records, diplomas, certificates of degrees, etc) in a sealed envelope, with a certification stamp across the seal if you are admitted.
但是又说：IMPORTANT: Some academic programs may require you to submit official academic credentials at the time of application. You MUST contact your program of study office to see if they require this additional documentation for admission review.