Property is the legal relationship between persons with respect to things. The law spells out what can be owned and the degree to which one person can assert an interest in someone else’s things. Property is classified in several ways: personal versus real, tangible versus intangible, private versus public. The first distinction, between real and personal, is the most important, for different legal principles often apply to each. Personal property is movable, whereas real property is immovable.

Among the ways personal property can be acquired are: by (1) possession, (2) finding, (3) gift, (4) accession, and (5) confusion.

Possession means the power to exclude others from using an object. Possession confers ownership only when there is no owner at the time the current owner takes possession. “Finders keepers, losers weepers” is not a universal rule; the previous owner is entitled to return of his goods if it is reasonably possible to locate him. If not, or if the owner does not claim his property, then it goes to the owner of the real estate on which it was found, if the finder was a trespasser, or the goods were buried, were in a private place, or were misplaced rather than lost. If none of these conditions applies, the property goes to the finder.

A gift is a voluntary transfer of property without consideration. Two kinds of gifts are possible: inter vivos and causa mortis. To make an effective gift, (1) the donor must make out a deed or physically deliver the object to the donee, (2) the donor must intend to make a gift, and (3) the donee must accept the gift. Delivery does not always require physical transfer; sometimes, surrender of control is sufficient. The donor must intend to give the gift now, not later.

Accession is an addition to that which is already owned—for example, the birth of calves to a cow owned by a farmer. But when someone else, through labor or by supplying material, adds value, the accession goes to the owner of the principal goods.

Confusion is the intermingling of like goods so that each, while maintaining its form, becomes a part of a larger whole, like grain mixed in a silo. As long as the goods are identical, they can easily enough be divided among their owners.

A fixture is a type of property that ceases to be personal property and becomes real property when it is annexed or affixed to land or buildings on the land and adapted to the use and enjoyment of the real property. The common-law rules governing fixtures do not employ clear-cut tests, and sellers and buyers can avoid many disputes by specifying in their contracts what goes with the land. Tenant’s fixtures remain the property of the tenant if they are for the convenience of the tenant, do not cause substantial damage to the property when removed, and are removed before possession is returned to the landlord.