How do you tell genuine cutting errors from fakes?
If you look on page 320 of the new cat you will see that Two Dollar Bank note sheets signed Thiessen-Crow prefix BBU were printed for sale in 40 note sheets.
Some people cut up these notes so they appear to be errors but are not true errors.
If you go through your cat you will see the other sheets that were printed for the public to purchase.
Denominations, signatures, prefixes
FRIEDSQUID