This is a list of songs falsely attributed to Nine Inch Nails (or related projects), through deliberate fraud, poor track marking or honest mistake.
Angel by Vinyl Sun
Claimed since the early 2000s due to a mislabelled Napster download. Official music video
It All Fades
A mashup of Quake and instrumental NIN tracks.
The Life You Didn't Lead
Unknown, listed in compilations on youtube and is claimed to be the demo of "The Life You Didn't Lead".
Potions (Deliverance Mix) by Puscifer
"Potions" is a song by Puscifer, written by Tapeworm, and is frequently claimed to have Trent Reznor on the song. He actually is simply given a writing credit, due to his work on it with Tapeworm.
Fading
Claimed to be by Tapeworm, actual artist is currently unknown.
Something Blue
Appears on the Rusty Nails II bootleg. Created by the person who made the bootleg, Mike Hitman Wilson.
Live In Me
Appears on the Rusty Nails II bootleg. Created by the person who made the bootleg, Mike Hitman Wilson.
More to come