This Checklist is intended to provide guidance on the issues which should be considered when preparing for and undertaking an internal investigation where it is suspected that a bribery offence or corruption offence has been committed under the Bribery Act 2010 or under the Prevention of Corruption Acts ie the Prevention of Corruption Act 1916 (PCA 1916), the Public Bodies Corrupt Practices Act 1889 (PBCPA 1889) and the Prevention of Corruption Act 1906 (PCA 1906). It covers initial considerations at the start of a bribery investigation including appropriate oversight by senior management, whistle-blower or other internal reporting strategies, conduct of an internal investigation, issues relating to legal professional privilege (LPP), internal interviews of staff, collecting documentary evidence, dealing with the Serious Fraud Office (SFO), Crown Prosecution Service (CPS) or police, what to do after a self-report has been made, and considerations relating to external stakeholders who might be impacted by a bribery internal investigation.