Under Penal Code section 4852.01,a certificate of rehabilitation is a court order that updates your criminal background. It demonstrates that you you "conduct yourself with sobriety and industry" and "exhibit a good moral character." It does not erase negative things on your criminal history but updates your record.
A certificate is a clear message that you have changed since your criminal past. Certain agencies will consider the certificate in making decisions, and it may relieve an offender from certain registration requirements. If you are interested in a certificate of rehabilitation, take a look at our comparison of law firms that specialize in this field.
You can find more information about a certificate of rehabilitation at this website.