Rule in Dumpor's Case

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Property law

Part of the common law series
Acquisition of property
Gift · Adverse possession · Deed
Lost, mislaid, or abandoned
Treasure trove
Alienation · Bailment · License
Estates in land
Allodial title · Fee simple · Fee tail
Life estate · Defeasible estate
Future interest · Concurrent estate
Leasehold estate · Condominiums
Conveyancing of interests in land
Bona fide purchaser
Torrens title · Strata title
Estoppel by deed · Quitclaim deed
Mortgage · Equitable conversion
Action to quiet title
Limiting control over future use
Restraint on alienation
Rule against perpetuities
Rule in Shelley's Case
Doctrine of worthier title
Nonpossessory interest in land
Easement · Profit
Covenant running with the land
Equitable servitude
Related topics
Fixtures · Waste · Partition
Riparian water rights
Lateral and subjacent support
Assignment · Nemo dat
Other areas of the common law
Contract law · Tort law
Wills and trusts
Criminal Law · Evidence

The Rule in Dumpor's Case is a common law rule of property law first set forth by Sir Edward Coke in 1578 (4 Coke 1196 [1578]). In its most basic form, it states that once a landlord has consented to an assignment of a tenant's interest in a leasehold estate, he implicitly consents to all future assignments by the tenant.

This rule is still operative in some U.S. states and some other jurisdictions which follow English common law, but the parties may contract around the rule by putting a clause in the lease agreement which allows the landlord to reserve his right to approve or disapprove an assignment.