This Serious Organised Crime Agency (SOCA) factsheet describes the submitting of a Suspicious Activity Report (SAR). A SAR is "a piece of information which alerts law enforcement that certain client/customer activity is in some way suspicious and might indicate money laundering or terrorist financing." The document answers the questions of why and when to submit a SAR, among other questions. "SOCA is an Executive Non-Departmental Public Body (NDPB) of the Home Office" of the United Kingdom.
Serious Organised Crime Agency
Serious Organised Crime Agency: http://www.soca.gov.uk/