"In re" is a phrase from Latin, which means “in the matter of.” In the legal world, it is used in documents to refer to a particular case that does not have an opposing party. The term "in re" also refers to a case that remains uncontested.
The term "in re" is used to refer to a person or an object considered as the primary subject in a lawsuit. It is commonly used in juvenile courts and probate proceedings. It may also be used in proceedings where the party filing the case doesn’t name an adversary.