HMRC Investigations Code of Practice 8
Fraud Investigation Service (FIS) is a specialist group of offices within HMRC which have the task of investigating the most serious cases of tax fraud and tax evasion. They also have responsibility for investigating cases of tax avoidance under Code of Practice 8 (COP8).
Special Investigations is HMRC’s most senior, and generally experienced, investigating body, and only becomes involved where there may be, in its view, a substantial amount of tax, or a serious issue involved. Dealing with a Special Investigations enquiry requires specialist professional advice and careful handling, if your interests are to be properly protected.