Dismissal of a conviction (what most people call expungement)
If you were convicted and completed probation, Penal Code section 1203.4 (opens in new window) lets the court withdraw your plea and dismiss the case. Related sections cover people who never got probation (section 1203.4a, after a year for most misdemeanors and infractions) and people who served a felony sentence in county jail or state prison (sections 1203.41 and 1203.42, after a waiting period).
A dismissal doesn't erase the conviction, but it changes who can see it and who can hold it against you, which for most people means employers.

