More re: HIN Validation / Problems
I'm guessing your problem originated due to import of Taiwan made vessel & Mfg not complying completely w/ the format in place at time of mfg / import
See the site
USCG HIN Validation & Verification Guidelines
Many times a HIN is verified as an 11 character or 13
character HIN. The format may be correct with either one
digit missing or one extra digit in the production serial
number portion of the HIN.
HIN with other than 12 characters
When the State encounters HINs on boats older than 10 years
from the date of manufacture that contain any number of characters
other than 12:
Ø The State should issue a State HIN using the New (Current) Format
Ø The last four of the State HIN should be the month and year issued
to that vessel.
Ø A record of the original HIN must be made a part of the boat’s record
and the owner should retain a copy for their records and should be
advised to keep a copy aboard their boat.
Ø On boats built prior to November 1, 1972 States are not
required to issue a State HIN but may do so.
All State Issued HIN’s must use the New (Current) Format
The last four must be the month and year state HIN is issued