For instance Courts Here will not accept a E Mail as Proof of anything let alone an acceptable way to lodge anything.
Even a Fax is only acceptable to get things in within a short time limit and they are held as Delivered till the Courier Hand Delivers the real documents.
Here the same applies to Medical Records and Bills there is currently no Medical Insurance Company who will pay out on a Bill/Receipt e mailed to them. At best they may accept the E Mail as proof that you are submitting something but most times it ends in the Bit Bucket and nothing more is thought about it till the Hard Copy arrives.
Just 2 industries that will not accept e mail for anything but jokes realistically.

Col