I wanted to check where this ink mark might have come from on the reverse side. Also it looks like the front side was printed much more to the lower right and not centered. Thank you.
It looks like the front of the bill was over inked and bled through to the reverse to me. Check the ink on the back and compare it to the front of the bill. Do the shapes and patterns match up? Kinda of to tell from the photos.
I do have one last question. I was looking at the reverse and I saw this small string which is circled in red. What might this be? Or is this common as well? I couldn't find a picture online with it. Also I checked the front but nothing because on the front side is where a small area of the seal is at.
If it's what I think you are describing, all bills (Federal Paper) have small thin fibers in red and blue woven into the paper. You should see them on the front and back of any and every bill you have, regardless of it's value. Get a magnifying glass and they are more easily seen.
Security fibers, which are blended into the paper pulp. Have been used extensively in paper money, checks etc for well over 100 years.
That part I know but is it normal for them to move the security fibers around different locations for the same year/series? Different 2013 one dollar note
Also possibly a "wiper" or "doctor blade" on the printer that was not kept clean and allowed some extra ink to be printed on the note.
The fibers can be literally anywhere and everywhere in the bills, they're mixed in when making the paper the bills eventually are printed on not set in certain places
