The "interesting paper" related to the Bank of Hawaii likely refers to either its —especially the rare World War II emergency overprints—or its modern financial research reports . Historical Paper Currency
: Before U.S. statehood, Hawaii issued "Silver Coin Deposit Certificates" in the late 19th century. These are now extremely rare. Recent Financial & Research Papers hawaii bank of
: After the war, millions of these notes were burned in local crematoriums and sugar mill furnaces. The "interesting paper" related to the Bank of
The Bank of Hawaii has a long association with unique paper money, which is now highly prized by collectors: These are now extremely rare
If you are looking for current analysis, several "interesting papers" and reports have been released recently: Hawaii - Banknotes from YOUR Hometown
: If Japanese forces had captured the islands, these specific bills could be demonetized instantly, preventing the enemy from using seized cash.