I have lived in the same place for over 25 years, have done all my banking through a credit union in which I have several different accounts.
Recently I got a letter from them concerning one of the accounts. It seems unless I took some action within a number of days they would be required to send the funds in that account to the state of California.
It seems I had not made a deposit or a withdrawal in three years and in the states eyes I abandoned it. Now the fact I had other accounts in the same bank did not seem to matter.
I ended up having to sign a form stating I did not in fact want the money sent to the state.
I should note, if the state does take money this way you can get it back if you discover they have done so, and the money was in fact yours to begin with. Not an easy process.
(Side note - there is a reason I have a separate account that I am not paying much attention to).
Go deposit a penny - drive them all nuts.
Write a check to do it.