There are as many as 50 different types of errors, but it is the degree of the fault that determines the value.
A relatively minor error may be a wrong serial number.
More appealing to collectors are notes that are missing all of their colour, or are totally blank on one side.
Example of banknote with missing colour
Error banknotes are those with any minor change from the original approved note.
These include :
errors made during cutting
different serial numbers
unprinted part of note
overprinted
missed or extra colour
inverted water mark
inverted letter or number
shifted print
Example of banknote with image shift
Errors must be removed during the inspection process, but if not seen during inspection and make it onto the open market,
usually command a premium price.
Example of banknote with missing print
Errors may range from tiny differences to major variations of the original note.
