Not Sufficient Funds -
Sufficient Funds, NSF,
Insufficient Funds, ISF are the same message. NSF
and ISF mean that at the time the check was presented to the account
holder's bank, there were not enough funds in the account to pay the
check or draft.
Usually if an item is stamped DO NOT REDEPOSIT, the account number is also crossed out or punched out with a hole punch.
Some banks will allow up to two attempts, and may stamp the NSF check like this, indicating it is fine to make a second attempt.