A non-disclosure petition is similar to an expunction. However, instead of deleting your record, it seals it, so these records are no longer available to anyone other than court or government officials. This way, a DUI that has a non-disclosure will no longer come up on your background check, which could have a significant impact on your ability to obtain gainful employment. The easiest way to differentiate between an expunction and a non-disclosure is think of an expunction as the magic eraser – it removes both the arrest and court case from all government records permanently; while a non-disclosure is like putting something behind a pay-wall – meaning that those with the correct credentials can see it – think law enforcement – but the public at large cannot.