[planede]

> the real document won't have hash colliding artifacts in it

I don't think that hash colliding artifacts would necessarily be obvious. They could be in part of a file that ends up being ignored by parsers of the file format. Or it could be some low level noise in pixel values in scanned documents.

[franga2000]

Both of those are things computer forensics experts are used to looking for and I'm certain even a beginner could find them.

[planede]

Are court documents routinely analyzed by computer forensic experts, or only when there is suspicion of tampering?