lawful excuse definition
Answered by The Community. Making the world better, one answer at a time. A LAWFUL EXCUSE is a defence that may be raised by the defendant at trial. The onus/burden is on the defendant that even though they were breaking a law, they have a legal reason why they did it, and thus should not be found guilty.EXAMPLE.nswered by The Community. Making the world better, one answer at a time. A LAWFUL EXCUSE is a defence that may be raised by the defendant at trial. The onus/burden is on the defendant that even though they were breaking a law, they have a legal reason why they did it, and thus should not be found guilty.