That is often referred to as a stuck digit . The fact that it is a Star Note or Replacement Note makes it much more valuable . If in Uncirculated Condition , it is valued between $80 - $140 . What makes your note a very nice error , is that most of these stuck digits have half or more of the number showing , your note shows just about nothing , which should be much more valuable than the normal stuck digit . Combine that with the Star Note and you should have no problem getting around $100 or more , if Condition is Uncirculated . If it's not in Uncirculated Condition probably $60-$80 .