(Or, more likely, someone else?)
The treasurer’s office maintains a “found money” database of funds that are trying to be reunited with their actual owners. Of course, you have to prove beyond a reasonable doubt that it IS actually owed to YOU.
How to start off? Go to www.nccash.com
Browse to the search engine and enter the required information. You might be surprised. Deposit checks from years back that didn’t make it to you because of an address typo or misspelled name. Refund or rebate checks, same reasons.