This study examines how the application of forensic accounting techniques would help in the detection and prevention of fraudulent practices in the Nigerian public sector entities. This study specifically aimed at finding out if the in-depth knowledge and skills in forensic accounting would help practitioners in detecting and preventing occupational frauds in Nigerian public sector organisations including the ministries, extra-ministerial departments and agencies. In order to guide this study, hypothetical conjectures were made and questionnaire used as primary source of data collection. The study employed survey design and a sample size of 100 respondents using purposive sampling technique. The chi-square test was used to analyse the data. Findings of the study suggest that forensic accounting techniques are effective in detecting and preventing fraudulent practices. It is also revealed that forensic accounting is a useful tool in discovering and preventing fraud thereby promoting transparency, accountability and public confidence. The study therefore recommended the adoption of forensic accounting techniques in Nigerian public sector entities to enhance transparency and accountability and that forensic accounting be legalised as a profession while training on forensic accounting skills is necessary for accountants and auditors in the public sector and necessary monitoring systems be put in place including viable internal control system mechanisms to curb fraud in the Nigerian public entities