Perpetrator - Professionals use this term to describe a domestic abuser, it can also be used for other crimes. (I have many other ways of describing them but I'll let you use your imagination ;) )
AP - Alleged perpetrator
CPS - Criminal Prosecution Service
CJS - Criminal Justice Service
NFA - No further action
NMO - Non-molestation order
SPO - Stalking protection order
IDVA - Independent domestic violence advisor
ISVA - Independent sexual violence advisor
CHISVA - Child and family independent sexual violence advisor
ISAS - Independent stalking advocacy caseworker
CAO - Child arrangements order
PSO - Prohibited steps order
SIO - Specific issue order
Ex- parte - Without notice
Applicant - person who makes an application for a civil order
Respondent - person who has not made the application for a civil order
Resident parent - parent who the child mostly lives with
OIC - Officer in case
MARAC - Multi-agency risk assessment conference
DARA - Domestic Abuse Risk Assessment
DASH - Domestic Abuse, Stalking, Harassment and Honour-based violence risk assessment