Fraud by omission occurs when an individual fails to disclose important information that results in misleading another party, ultimately leading to financial harm or deception. This form of fraud relies on the absence of necessary facts, which can create a false impression or distort the truth, thereby impacting decision-making processes. It's essential to recognize that this type of fraud isn't just about what is said, but also about what isn't communicated, highlighting the ethical obligation to disclose material information.