The Missouri Affidavit for Security Release is a document used by a lender or a seller to release security interest in personal property. This document is typically used to clear the title of a vehicle, as it releases the lien holder's interest in the vehicle. There are two types of Missouri Affidavit for Security Release documents: the Original Affidavit for Security Release and the Duplicate Affidavit for Security Release. The Original Affidavit for Security Release is used when the lien holder has been paid in full and wants to release their interest in the property. This document must be notarized and filed with the appropriate county office. The Duplicate Affidavit for Security Release is used when the original document has been lost or destroyed and a new one needs to be filed. This document also must be notarized and filed with the appropriate county office.