Merci pour vos réponses !
En cherchant j'ai finalement trouvé, je partage mes découvertes si ça intéresse quelqu'un :
right in rem - Collaborative International Dictionary of English v.0.48 :
In rem \In rem\ [L.] (Law)
Lit., in or against a (or the) thing;
Note: used:
(a) Of any right (called
right in rem or
jus in rem) of such a nature as to be available over its
subject without reference to one person more than another,
or, as generally expressed, a right competent, or
available, against all persons. Rights in rem include not
alone rights over physical property, but all rights
available against all persons indifferently, as those of
life, liberty, and reputation.
(b) Of actions for recovering or reducing to possession or
enjoyment a specific object, as in the enforcement of
maritime liens against a vessel, which is made the
defendant by a sort of personification. Most actions for
the specific recovery of property in English and American
law are in the nature of actions in personam against a
person alleged to be unlawfully withholding the property.
[Webster 1913 Suppl.]
Voilà
