Real property and personal property 

Property law organises everything a person can own around two structural distinctions: what is owned, and what kind of right is held in it. Understanding both distinctions before studying any specific doctrine — possession, title, registration, leases, mortgages, or personal property security — makes the rest of the subject far easier to place.

Real property and personal property

Real property is, broadly, land and the interests recognised in land: the fee simple, leasehold interests, easements, mortgages over land, and other estates and interests that attach to a defined parcel. The term reflects the old common-law action for the recovery of land itself (a "real" action), rather than mere damages.

Personal property is everything else capable of being owned: chattels such as vehicles, livestock, art and equipment, and intangible property such as debts, shares, intellectual property and other choses in action. Historically, a wrongful taking of personal property gave rise only to a personal action for damages, not to recovery of the thing itself, which is the origin of the label.

The distinction still matters practically. Real property transactions are governed by jurisdiction-specific conveyancing and land title legislation, attract particular formality requirements, and are usually recorded on a public register. Personal property has no single unifying registration system, although the Personal Property Securities Act 2009 (Cth) now provides one national register for security interests over it.¹ Limitation periods, formality rules for transfer, and the remedies available for interference commonly differ between the two categories.

Choses in possession and choses in action

Personal property itself divides further. A chose in possession is a tangible item that can be physically held — a car, a painting, a flock of sheep. A chose in action is an intangible right that can only be enforced by legal action rather than by taking physical possession — a debt, a cheque, shares in a company, a right under a contract, or intellectual property. Choses in action are transferred by assignment rather than by delivery, and the rules governing assignment (including whether notice to a debtor is required) differ from the rules governing transfer of a chose in possession.

Rights in rem and rights in personam

The second foundational distinction cuts across the first. A right in rem is a right in a thing itself, good against the world (or at least against a very wide class of people) — ownership and possessory rights are the paradigm examples. A right in personam is a right against a specific person, arising from a personal obligation such as a contract or a tort, and enforceable only against that person or their estate.

The distinction explains why property law and the law of obligations produce different remedies. A right in rem can found an action against a third party who never dealt with the rights-holder at all — for example, an owner can recover a chattel from whoever currently holds it, not only from the person who took it. A right in personam cannot: it binds only the parties (and, in limited circumstances, those who take with notice of it, which is where equity's in personam exceptions to registered title become important). Many disputes in property law turn on correctly characterising an interest as one or the other, particularly when an interest has not been registered or perfected in the way the relevant statutory scheme requires.

Why this distinction organises the rest of the subject

Every later topic in this module builds on this orientation. Possession and title both ask what quality of right a person holds, independently of formal registration. Torrens title and the Personal Property Securities Act are, respectively, the statutory registration systems for real and personal property, and each defines its own rules for what defeats an unregistered interest. Leases and mortgages are themselves examples of proprietary interests that must be distinguished from the merely personal (a licence, an unsecured debt) using exactly the in rem/in personam distinction developed here.

Applying this in a problem question

1. Identify whether the property in dispute is real property (land and interests in land) or personal property (chattels or choses in action).
2. If personal property, decide whether it is a chose in possession or a chose in action, since the rules for transfer and enforcement differ.
3. Characterise the right asserted as in rem or in personam, and explain what that classification means for who can be sued and what remedy is available.
4. Identify whether a registration or perfection scheme applies to the interest in question, and if so, whether the interest has been registered or perfected.
5. Only then move to the specific doctrine (possession, title, leases, mortgages, or security interests) that governs the dispute.