Which envelope does USCIS use for the I-797 and final approval?

[cct]

In my application to the Department of State for the waiver of the two year home residency requirement, I provided two self-addressed prepaid courier (Fedex) envelopes and International Airway Bill instead of the USPS self-addressed stamp envelopes. 

 

I wonder whether would USCIS use this. And if they do not, would USCIS send me the receipt and final approval using their own envelopes and stamp?

 

 

[J1waiver205]

I have created a blog explaining each step in details well.

 

Your question has been answered in the blog.

 

Please see it at http://chemgc205.tumblr.com

[J1waiver205]

In my application to the Department of State for the waiver of the two year home residency requirement, I provided two self-addressed prepaid courier (Fedex) envelopes and International Airway Bill instead of the USPS self-addressed stamp envelopes. 

 

I wonder whether would USCIS use this. And if they do not, would USCIS send me the receipt and final approval using their own envelopes and stamp?

The blog is on ****************..com