Financial Documentations for International Students?

Hi, I will be going to the U.S as an F-1 VISA. Currently, I am a F-2.
So far, I have applied to 4 schools, and plan on to apply to 4 more.
I have applied to Pitt, Vtech, UIUC, and Penn State. And I plan to apply to U of Michigan Ann-arbor, Gtech, OSU and Purdue.

When I applied to Vtech, I received an e-mail saying that.
NOTE: If you are planning to attend Virginia Tech on a F-1 or J-1 student visa, we must receive your completed financial documentation forms before your application will be reviewed.

I was confused because don’t most schools ask for international student’s financial documentations after they are notified of enrollment?

I am wondering if any of the other schools I applied/apply to will require a financial document before the application is reviewed.

Please help! Thank you all!