Like this: the individual has a bank account with some left over balance (not much) but the last time it was ever used for any transactions was like 48 months ago (since then, no further activity has been recorded nor has the associated card been used to conduct a transaction). Just because it’s inactive, can the bank close that person’s account due to inactivity?
If it’s a debit/checking/savings, no, they can’t close the account. However, they can fine the account until the balance is gone and you go into debt. Then they will make you pay the fines to close the account.