Delaware Code
Chapter 49A. AUTO REPAIR FRAUD PREVENTION
§ 4906A. Replaced parts — Requirement for return to the customer.

An automotive repair facility shall offer to return all replaced parts to the customer or a person acting on his or her behalf, except parts which are returned to a manufacturer or distributor, hazardous materials or other items which the automotive repair facility is otherwise required to properly dispose of or recycle. Nothing herein shall require the auto repair facility to retain replaced parts after final invoice.