It means that in law you are no longer regarded as having committed any offence. Your Youth Justice Court record cannot be disclosed to anybody after the time periods outlined above. The records kept by the police in central repository (CPIC) have to be physically destroyed after this time period.
If you have been found guilty of murder, attempted murder, manslaughter, aggravated sexual assault or a serious violent offence your police record could be kept indefinitely in a special record repository.
The “destruction” of these records is automatic and you do not have to take steps to have your record destroyed.
You should make sure that all records relating to you are sealed or destroyed after the time period by first, contacting the RCMP Central Repository to obtain a document certifying that your record is sealed or destroyed, and then do the same with the court and local police.