B. Different than ownership: Possession is not the same as ownership. Ownership is "title," and is usually proved by showing documents signed by the previous owner of first possessor transferring title to the present titleholder. Possession is proved by showing physical control and the intent to exclude others.
NOTE: Possession is easier to prove than ownership.
EX: A buys a watch from a jeweler, who bought it from the manufacturer. B steals the watch from A. To recover the watch, A must prove ownership or prior possession of the watch. To prove ownership, one must produce the sales slip from the jeweler or other proof of title, which A has probably lost. To prove prior possession, though, A has only to prove that the watch was in A's physical possession before theft.
C. Constructive possession: A person is in "constructive possession" when the law treats him as if he is in possession although, in fact, he is unaware of it. Constructive means "in the eyes of the law." A court can still find the find has better claim than the private property owner.