The Latin Legal Maxim of; "assignatus utitur jure autoris" means:
"an assignee is clothed with the rights of his/her principal" or "that which is assigned takes with it for its use the rights of the assignor".
It is a legal maxim that applies to the relationship between principals and agents.
It means that when a man or woman; assigns their rights to another man or woman; the assignee inherits not only the rights, but also the legal actions that can enforce those rights.
However, the value of the assigned rights cannot exceed the value of the original rights.
For example, if A assigns their right to receive £100 from B to C, then C can sue B for £100, but not more. This phrase is often used in contract law and bankruptcy law.
"assignatus utitur jure autoris" Law & Legal Definition.
https://definitions.uslegal.com/a/assignatus-utitur-jure-auctoris