I came across a 2001 Ten Dollar Bill today with arkings on the back that I have never seen before. I'm not a collector but curious as to what they might mean. Someone also has autographed the note, again I have no clue who or why, but probably someone noteable. On the upper right side is the word "Ariel" and on the left edge is the letter "I" the logo with a "SF" and the letters "D.C".
I appreciate the education. Thanks in advance.