An “Expungement” under California Penal Code section 1203.4 makes exceptions for professional licensing, law enforcement and working for the lottery. To those agencies, the conviction and fact that it was dismissed pursuant to Penal Code section 1203.4 must be disclosed.
In general, an expungement seals the record of an arrest or a conviction from public record; thus, the person does not need to list the event on public documents unless specifically asked to do so by authorities. This makes the process an attractive option for those embroiled in DUI/DWI cases, particularly if they have no previous criminal records. Without an expungement, a conviction can make it difficult for one to seek employment, apply for further education in a university, or adopt a child.
http://www.chastainelaw.net/sacramento-expungement-attorney-differentiates-expungements-v-pardons/
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