MBE Rules · Criminal Law
Ignorance and Due Process Notice
Lambert v. California
The rule
Due process bars convicting for wholly passive omission (failing to register) when the defendant had no notice and none was probable — a narrow exception to ignorance of the law being no excuse.
In plain English
The rule states that a person cannot be convicted for failing to act (like not registering for something) if they had no reasonable way of knowing that they were required to act. This is a specific exception to the general principle that ignorance of the law is not a valid defense.
Worked example
Alice was charged with failing to register her vehicle, but she had never received any notice about the registration requirement and there was no reasonable way for her to know about it. The court found that Alice could not be convicted because she lacked the necessary notice. Therefore, the charges against her were dismissed.
Memory hook
No notice, no conviction for passive omissions!
The trap
Exams may present scenarios where a defendant claims ignorance, but students might overlook whether notice was actually provided or probable. This can lead to confusion about the applicability of the rule.
How examiners test it
Questions often involve fact patterns where a defendant's omission is scrutinized, focusing on whether they had adequate notice of the legal requirement to act. Look for clues about the reasonableness of the defendant's knowledge.
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