PROPERTY LAW MINI GUIDE 2026
STUDY UNIT 4: ORIGINAL ACQUISITION OF OWNERSHIP
1. Introduction
Original acquisition = Ownership obtained without cooperation of a previous owner.
No predecessor in title; ownership is acquired independently.
Examples: appropriation, accession, specification, prescription, expropriation, etc.
In contrast, derivative acquisition occurs with cooperation from a predecessor (see SU
5).
Principle: ownership arises newly, not transferred.
Example: You catch a fish in the sea (res nullius) — you become owner by original acquisition.
2. Appropriation (Occupatio)
Definition:
The unilateral taking of physical control of a thing that belongs to no one (res nullius), within
the sphere of law, with the intention of becoming its owner.
Elements:
1. Control: Physical control or possession.
2. Thing belonging to no one (res nullius):
o Examples: wild animals, fish, seashells, lost property intentionally abandoned
(res derelicta).
3. Thing within legal sphere (res in commercio): Must be capable of ownership.
4. Intention to become owner (animus domini).
Case Example:
In R v Mafohla 1958 (2) SA 351 (A), control is key — wounding a wild animal ≠ ownership
unless captured.
Example:
If S wounds a wild kudu but Q catches it, Q becomes the owner because he exercised physical
control.
3. Accession (Accessio)
Definition:
When an accessory thing becomes merged with a principal thing, forming one entity. The
accessory loses independence, and the owner of the principal thing becomes owner of the
composite thing.
Key Idea:
The accessory thing becomes part of the principal thing (e.g., land and building materials).
,3.1 Types of Accession
(a) Immovables to Immovables
(i) Invisible Accretion (Alluvio)
Gradual, imperceptible addition of land through natural action of water.
Only occurs with natural boundaries (rivers or sea).
(ii) Visible Accretion (Avulsio)
Sudden addition of land (e.g., through floods or landslides).
Ownership changes when plants take root.
(iii) Island Arising in River (Insula nata in flumine)
Island forms naturally in a river.
Divided proportionally among riparian owners.
Case: Van Niekerk and Union Government (Minister of Lands) v Carter 1917 AD 359.
(iv) Dry Riverbed (Alveus derelictus)
Ownership of old dry riverbed transfers to riparian owners when a river changes course.
(b) Movables to Immovables
(i) Sowing and Planting (Satio et Plantatio)
Crops and plants belong to landowner, not the sower, unless agreed otherwise.
(ii) Building (Inaedificatio)
When a movable (building material) becomes part of land, it becomes property of the
landowner.
Land = principal thing, building material = accessory thing.
Example:
If you build on someone else’s land, the landowner becomes owner of the building, not the
builder.
(c) Movables to Movables
Definition: One movable merges with another to form a single thing.
Examples:
Painting (pictura): The painter becomes owner of the painting (new thing).
Weaving (texitura): Yarn woven into cloth.
, Writing (scriptura): Author owns the writing, not the owner of the paper.
Test: Which part gives the new object its essential nature.
4. Mixing of Solids (Commixtio) & Mingling of Fluids (Confusio)
Definition:
Occurs when movable things belonging to different owners are mixed or blended so they
cannot be separated.
Elements:
1. Movables of different owners.
2. Mixed without consent.
3. Must result in inseparable mixture.
If mixed by agreement: Co-ownership arises (not accession).
If without consent: Ownership depends on who contributed or whether separation possible.
Example:
If X’s grain mixes with Y’s by accident → joint ownership proportional to contribution.
If X deliberately mixes to harm Y → Y may claim compensation or ownership depending on
intention.
5. Manufacture or Specification (Specificatio)
Definition:
An original method of acquiring ownership by unauthorised production of a completely new
thing from material belonging to another.
Elements:
1. Unauthorised production – owner of material did not consent.
2. Completely new thing formed – e.g., wine from grapes, ship from wood.
3. Belonging to different owners.
Ownership result:
If new product cannot be reverted → manufacturer becomes owner (must compensate
material owner).
If new product can be reverted → material owner remains owner.
Example:
If X makes a gold cup from Y’s gold → Y remains owner (gold can be restored).
If X makes wine from Y’s grapes → X becomes owner, must compensate Y.
6. Acquisition of Fruits (Fructus)
, Definition:
Occurs when a person who is entitled to separate or gather fruits does so.
Before separation → fruits belong to the owner of the principal thing.
After separation → they become independent and capable of ownership.
Types of Fruits:
1. Natural fruits (fructus naturales): Milk, wool, fruit, offspring.
o fructus pendentes – attached
o fructus separati – separated naturally
o fructus percepti – gathered or harvested
2. Civil fruits (fructus civiles): Rent, interest, dividends.
Elements:
1. Fruits exist.
2. Separation occurs (naturally or by act).
3. Person entitled to fruits acquires ownership after separation.
Example:
Tenant entitled to use land may collect fruit when it ripens — becomes owner upon picking.
7. Treasure Trove
Definition:
An original method of acquiring ownership where money or valuable objects have been
hidden so long that the owner cannot be traced, and the finder discovers it by chance.
Elements:
1. Thing hidden long ago.
2. Owner untraceable.
3. Discovery by chance.
4. Thing must be capable of ownership.
Ownership:
Usually shared between finder and landowner according to custom or statute (may go to the
State).
8. Expropriation
Definition:
Ownership acquired by the State in the public interest, upon payment of compensation.
Example: Taking land for a public road or dam.
Governed by the Constitution, s 25, and the Expropriation Act 63 of 1975.
STUDY UNIT 4: ORIGINAL ACQUISITION OF OWNERSHIP
1. Introduction
Original acquisition = Ownership obtained without cooperation of a previous owner.
No predecessor in title; ownership is acquired independently.
Examples: appropriation, accession, specification, prescription, expropriation, etc.
In contrast, derivative acquisition occurs with cooperation from a predecessor (see SU
5).
Principle: ownership arises newly, not transferred.
Example: You catch a fish in the sea (res nullius) — you become owner by original acquisition.
2. Appropriation (Occupatio)
Definition:
The unilateral taking of physical control of a thing that belongs to no one (res nullius), within
the sphere of law, with the intention of becoming its owner.
Elements:
1. Control: Physical control or possession.
2. Thing belonging to no one (res nullius):
o Examples: wild animals, fish, seashells, lost property intentionally abandoned
(res derelicta).
3. Thing within legal sphere (res in commercio): Must be capable of ownership.
4. Intention to become owner (animus domini).
Case Example:
In R v Mafohla 1958 (2) SA 351 (A), control is key — wounding a wild animal ≠ ownership
unless captured.
Example:
If S wounds a wild kudu but Q catches it, Q becomes the owner because he exercised physical
control.
3. Accession (Accessio)
Definition:
When an accessory thing becomes merged with a principal thing, forming one entity. The
accessory loses independence, and the owner of the principal thing becomes owner of the
composite thing.
Key Idea:
The accessory thing becomes part of the principal thing (e.g., land and building materials).
,3.1 Types of Accession
(a) Immovables to Immovables
(i) Invisible Accretion (Alluvio)
Gradual, imperceptible addition of land through natural action of water.
Only occurs with natural boundaries (rivers or sea).
(ii) Visible Accretion (Avulsio)
Sudden addition of land (e.g., through floods or landslides).
Ownership changes when plants take root.
(iii) Island Arising in River (Insula nata in flumine)
Island forms naturally in a river.
Divided proportionally among riparian owners.
Case: Van Niekerk and Union Government (Minister of Lands) v Carter 1917 AD 359.
(iv) Dry Riverbed (Alveus derelictus)
Ownership of old dry riverbed transfers to riparian owners when a river changes course.
(b) Movables to Immovables
(i) Sowing and Planting (Satio et Plantatio)
Crops and plants belong to landowner, not the sower, unless agreed otherwise.
(ii) Building (Inaedificatio)
When a movable (building material) becomes part of land, it becomes property of the
landowner.
Land = principal thing, building material = accessory thing.
Example:
If you build on someone else’s land, the landowner becomes owner of the building, not the
builder.
(c) Movables to Movables
Definition: One movable merges with another to form a single thing.
Examples:
Painting (pictura): The painter becomes owner of the painting (new thing).
Weaving (texitura): Yarn woven into cloth.
, Writing (scriptura): Author owns the writing, not the owner of the paper.
Test: Which part gives the new object its essential nature.
4. Mixing of Solids (Commixtio) & Mingling of Fluids (Confusio)
Definition:
Occurs when movable things belonging to different owners are mixed or blended so they
cannot be separated.
Elements:
1. Movables of different owners.
2. Mixed without consent.
3. Must result in inseparable mixture.
If mixed by agreement: Co-ownership arises (not accession).
If without consent: Ownership depends on who contributed or whether separation possible.
Example:
If X’s grain mixes with Y’s by accident → joint ownership proportional to contribution.
If X deliberately mixes to harm Y → Y may claim compensation or ownership depending on
intention.
5. Manufacture or Specification (Specificatio)
Definition:
An original method of acquiring ownership by unauthorised production of a completely new
thing from material belonging to another.
Elements:
1. Unauthorised production – owner of material did not consent.
2. Completely new thing formed – e.g., wine from grapes, ship from wood.
3. Belonging to different owners.
Ownership result:
If new product cannot be reverted → manufacturer becomes owner (must compensate
material owner).
If new product can be reverted → material owner remains owner.
Example:
If X makes a gold cup from Y’s gold → Y remains owner (gold can be restored).
If X makes wine from Y’s grapes → X becomes owner, must compensate Y.
6. Acquisition of Fruits (Fructus)
, Definition:
Occurs when a person who is entitled to separate or gather fruits does so.
Before separation → fruits belong to the owner of the principal thing.
After separation → they become independent and capable of ownership.
Types of Fruits:
1. Natural fruits (fructus naturales): Milk, wool, fruit, offspring.
o fructus pendentes – attached
o fructus separati – separated naturally
o fructus percepti – gathered or harvested
2. Civil fruits (fructus civiles): Rent, interest, dividends.
Elements:
1. Fruits exist.
2. Separation occurs (naturally or by act).
3. Person entitled to fruits acquires ownership after separation.
Example:
Tenant entitled to use land may collect fruit when it ripens — becomes owner upon picking.
7. Treasure Trove
Definition:
An original method of acquiring ownership where money or valuable objects have been
hidden so long that the owner cannot be traced, and the finder discovers it by chance.
Elements:
1. Thing hidden long ago.
2. Owner untraceable.
3. Discovery by chance.
4. Thing must be capable of ownership.
Ownership:
Usually shared between finder and landowner according to custom or statute (may go to the
State).
8. Expropriation
Definition:
Ownership acquired by the State in the public interest, upon payment of compensation.
Example: Taking land for a public road or dam.
Governed by the Constitution, s 25, and the Expropriation Act 63 of 1975.
