Except as otherwise provided by applicable state or federal law, including title 42a, if a Connecticut bank or Connecticut credit union has rendered a statement or delivered a passbook to its depositor or share account holder reflecting transactions in or the balance of a deposit account or share account, and unless a court of competent jurisdiction determines, in an action filed by the depositor or share account holder against such bank or credit union before the expiration of seven years from the date of the rendering of the statement or the delivery of the passbook, that the statement or passbook was inaccurate or incomplete, then, upon the expiration of the seven-year period, at the option of such bank or credit union, the statement or passbook is deemed accurate and complete as of the date of the statement or the delivery and as to each transaction and any balance reflected in the statement or passbook, and such depositor or share account holder is thereafter barred from questioning the correctness of any transaction and any balance reflected therein for any cause. Nothing in this section shall be construed to relieve the depositor or share account holder from the duty imposed by law or contract of exercising due diligence in the examination of any such statement or passbook when rendered by the bank or credit union, and of immediate notification to the bank or credit union upon discovery of any error therein, nor from the legal consequences of neglect of such duty.