Cohabitation investigations by a private investigator involve the gathering of evidence to confirm whether an individual receiving alimony or spousal support is cohabiting with a romantic partner in a shared living arrangement. The investigator utilizes techniques like surveillance, interviews, and documentation checks to establish the nature and extent of the cohabitation. The objective is to provide accurate information to support legal decisions regarding the continuation or modification of financial support. These investigations are typically conducted discreetly and ethically, ensuring that the evidence collected can be used in court if necessary.