A lack of good faith will be imputed to a party when she is negligent in discovering something is wrong with the instrument.

Good Faith

The principle of honesty and fairness in dealings, implying a sincere intention without deception.

Negligent

A failure to behave with the level of care that someone of ordinary prudence would have exercised under the same circumstances, leading to unintended harm.

Instrument

A written legal document that formalizes an agreement or obligation between parties or is used to create a formal record.