This booklet has been developed as a practical guide for investigating any complaint received within the organization related to PSEA, Fraud, Financial Malpractice, or Safeguarding, following a well-structured, fair, and evidence-based process. This booklet should be put into use as soon as such a complaint is received, and followed step by step until the investigation is concluded and the report is finalized. Focal points, HR representatives, or members of the investigation team should complete the forms attached in this booklet (Complaint Intake Form, Investigation Plan, Interview Record, Report Format, and Supporting Document Checklist) in sequence, ensuring consistency, transparency, and accountability throughout the investigation process, while safeguarding the fair rights of the victim, witnesses, and the accused alike.