Some minor sexual offenses that are in the undisclosed category of the sex offense registry can be relieved from the lifetime duty to register, if they obtain a certificate of rehabilitation. You can apply for a certificate of rehabilitation in seven to ten years after you’re released from custody, depending on the offense.nnExpungement is possible if you were not sentenced to prison. However, after you successfully complete probation, you can apply to have the case expunged, which means dismissed and not on your record, although that does not relieve you from the requirement to register as a sex offender.