Hire a Private investigators in Australia. Catch cheating spouses, locate debtors, and conduct background checks. Contact us for a confidential consultation.Hire experienced private investigators in Australia. Catch cheating spouses, locate debtors, and conduct background checks. Contact us for a confidential consultation.National Inquiry Agency is one of the few private investigation firms in Australia Founded by a female Solicitor and Private Detective. Since being established in 2019, our private detective agency has been hired to service clientele from varied backgrounds. This includes mothers, fathers, professionals, high-net worth individuals, business owners and individuals with particular needs.