 In cases such as "Lee v. United States", "Lopez v. United States", and "Hoffa v. United States", the courts have ruled that evidence found in searches based on consent obtained by an undercover officer or as an informer to be admissible.A party other than the defendant can, in some limited cases, grant consent.The consenting party needs to actually possess or be believed by the searching officer to possess “common authority over or other sufficient relationship to the premises or effects sought to be inspected.” For example, the Supreme Court in "United States v. Matlock" (1974) held that co-occupant of a house had actual authority to consent to a search of the house.