Owner purposefully places something somewhere and forget to retrieve it.
Example: X places wallet on store counter wit the intention of retrieving it while paying for items and walks away, leaving wallet on the counter.
Lost
Involuntarily leaving something somewhere.
Example: Wallet falls out of pocket/purse, unknown to X.
Bailment
When X who owns a piece of property (bailor) and gives the property Y (bailee) for a specific purpose and with the intent of retrieving.
Example: Restaurant coat check
Possessory Interest
The right to possess something.
Conversion
Applies to personal property.
Replevin
When a person whose possessory interest was violated asks the court to have the item returned.
Trover
When a person whose possessory interest was violated asks damages (money instead of return of the item).
Ejectment
Having a person physically removed by court order.
Trespass
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Locus Owner
A person who owns the property that an item is found.
Bailee
A person who finds something is by operation of law a bailee and is required to exercise reasonable care, and take reasonable steps to determine the true owner.
Bailor
A person who is given something to hold for safe keeping with the intent to return it.