''Casu proviso'' was a

writ In common law, a writ (Anglo-Saxon ''gewrit'', Latin ''breve'') is a formal written order issued by a body with administrative or judicial jurisdiction; in modern usage, this body is generally a court. Warrants, prerogative writs, subpoenas, ...

of entry, given by the

Statute of Gloucester The Statute of Gloucester (6 Edw 1) is a piece of legislation enacted in the Parliament of England during the reign of Edward I. The statute, proclaimed at Gloucester in August 1278, was crucial to the development of English law. The Statute of Gl ...

, in cases where a tenant in

dowry A dowry is a payment, such as property or money, paid by the bride's family to the groom or his family at the time of marriage. Dowry contrasts with the related concepts of bride price and dower. While bride price or bride service is a payment ...

transfers property to another in fee, or for term of life, or in tail. The writ lies for him in reversion against the transfer.

References

Writs Medieval English law 1278 in England 1278 1270s in law English legal terminology Legal documents with Latin names {{England-law-stub