Adverse Possession
Real Property · Lesson 02
Adverse Possession
這一課問的是：占用人是否已透過長期、公然、連續、排他、敵意之占有，將事實上的占用「熟成」為法律上的所有權？
Actor
Act
Object
Standard
Consequence
Visual Scene · the picture in your head
Issue. Has the possessor's use ripened into title — open, notorious, continuous, exclusive, hostile, for the statutory period?
這一課問的是：占用人是否已透過長期、公然、連續、排他、敵意之占有，將事實上的占用「熟成」為法律上的所有權？
Core Terminology · 7 must-know
Tap a card to flip and reveal the meaning.
adverse possession
Tap to see meaning
Doctrine awarding title to one who satisfies the elements over the statutory period.
逆權侵占。
open and notorious
Tap to see meaning
Possession visible enough to put a reasonable owner on notice.
公然顯著。
continuous
Tap to see meaning
Use is as continuous as a true owner would make.
連續。
exclusive
Tap to see meaning
Possessor does not share with the true owner or general public.
排他。
hostile
Tap to see meaning
Without the true owner's permission.
敵意（非經許可）。
statutory period
Tap to see meaning
Period prescribed by state statute, often 10-20 years.
法定期間。
tacking
Tap to see meaning
Privity between successive adverse possessors allows aggregation of time.
期間累積（須有 privity）。
Issue · what this lesson is really about
Has the possessor's use ripened into title — open, notorious, continuous, exclusive, hostile, for the statutory period?
這一課問的是：占用人是否已透過長期、公然、連續、排他、敵意之占有，將事實上的占用「熟成」為法律上的所有權？
Trigger words & phrases that should flag this issue:
squatteroccupied without permission20 yearsfencedbuilt a fencecolor of title
Expression Bank · how lawyers actually say it
Six function → sentence patterns. Use these in essay applications.
| Function | English sentence | 中文 |
|---|---|---|
| State elements | Adverse possession requires possession that is open and notorious, continuous, exclusive, and hostile for the statutory period. | 逆權侵占須具備公然、連續、排他、敵意 + 法定期間。 |
| Apply open | P erected a visible fence and made improvements observable from the road. | P 立可見圍籬並改建。 |
| Apply continuous | P's use matched what a true owner of similar land would make seasonally. | P 之使用符合真正所有人之季節性使用。 |
| Address hostility | P entered without permission; hostility is judged objectively, regardless of P's subjective belief. | P 無經許可而占；敵意客觀判斷。 |
| Apply tacking | Successive possessors in privity may tack their periods together. | 具 privity 之承繼占用人可累積期間。 |
| State result | Title therefore vested in P at the close of the statutory period. | 因此於法定期間屆滿，所有權歸 P。 |
Rule Sentence · the workhorse
Adverse possession transfers title to the possessor where possession is open and notorious, continuous, exclusive, hostile, and lasts for the statutory period.
Sentence Anatomy · 5 roles, 5 colors
Every rule sentence breaks into five visual roles.
Actor 行為人the possessor占用人
Act 行為possessing the land占有土地
Object 對象another's real property他人不動產
Standard 法律標準OCEAN + statutory period元素 + 法定期間
Consequence 後果title transfers所有權移轉
Casebook Snapshot · a real American case
Van Valkenburgh v. Lutz
Holding. Adverse possession requires actual use of the land as an ordinary owner would use it. Building a small shed and cultivating a portion of a contested lot is insufficient where the possessor did not substantially improve or enclose the entire claimed area for the statutory period; the burden of proof is on the claimant.
Why it matters. Possession must look like ownership — substantial, visible, and over the entire area claimed.
占有須像所有人之使用 — 實質、可見、覆蓋整個主張之區域。
Common Mistakes · what trips students
✗ 「敵意」要主觀知道土地不是自己的。
✓ Most states use objective test; subjective intent irrelevant.
多數州採客觀標準；主觀無關。
✗ 打了一根樁就算 open and notorious。
✓ Acts must put a reasonable owner on notice.
行為須足以令合理所有人察覺。
✗ 間斷使用也算 continuous。
✓ Continuity is judged by ordinary use of similar land.
以同類土地之尋常使用判定。
✗ 經所有人「默許」可進行 AP。
✓ Permission destroys hostility.
許可消滅敵意。
Mini IRAC · build the Application
Issue. Did P acquire title to the disputed strip of land by adverse possession after 22 years of fenced, continuous use, where the statutory period is 20 years?
Rule. Adverse possession vests title in the possessor whose possession is open and notorious, continuous, exclusive, and hostile for the statutory period.
Application (model). P fenced the strip, mowed it weekly, and parked vehicles on it for 22 years without the record owner's permission. Because adverse possession requires possession that is open and notorious, continuous, exclusive, and hostile for the statutory period, the fact that P's fence and weekly use were highly visible — and continued without permission for over 20 years — means each element is satisfied.
Pick the right element for each blank:
g1.
g2.
g3.
Conclusion. Therefore, title to the disputed strip vested in P at year 20.
MBE Check · multiple choice
X possessed Blackacre under color of title for 8 years, then sold his interest by quitclaim to Y, who continued possessing for 13 more years. Statutory period is 20 years. Does Y own Blackacre by adverse possession?
Mini Essay · write the Application paragraph
Facts. In 2002 P moved onto a vacant lot adjacent to her own. She built a chain-link fence around it, planted apple trees, and mowed seasonally. P never sought permission. In 2010 P's brother B moved in with her by gift; P then died and willed everything to B in 2014. B kept the fence, kept harvesting apples, and lived on the property through today (2026). Statutory period: 15 years.
Call. Has B acquired title by adverse possession?
Practice Drill · tap to build the rule
Drop the chips here in correct order:
Tap chips to add → tap chips in the target to remove: