The abbreviations following an entry in the Directory indicate that a Director, Proprietor, Partner or Member of Staff of that organisation is a member/associate member/fellow, etc. of the following professional bodies:

ABI	Association of British Investigators Ltd
ACEA	Association of Civil Enforcement Agencies (See also, CIVEA)
ACFE	Association of Certificated Fraud Examiners
ALDONYS	Association of Licensed Detectives of New York State
API	Academy of Professional Investigation
ASC	Association of Security Consultants
ASIS	American Society of Industrial Security
BA/BSc	Bachelor of Arts/Science Degree
BAG	British Agents Group
BAIPS	British Association of Investigators & Process Servers
CBA	now renamed ESA
CCA	Consumer Credit Association
CII	Council of International Investigators
CIVEA	The Civil Enforcement Association
CPA	Cyprus Police Association
CSA	Credit Services Association
EFPI	European Federation of Professional Investigators
ELG	E Legal Gathering
EPIC	Ex Police in Industry & Commerce
ESA	Enforcement Services Association
ExMet CID A	Ex Metropolitan Police CID Officers Association
FAP	Fraud Advisory Panel
FS	Fingerprint Society
FSS	Forensic Science Society
HCEOA	High Court Enforcement Officers Association
IAATI	International Association of Auto Theft Investigators
IACP	International Association of Chiefs of Police
IAIFA	International Association of Insurance Fraud Agencies Inc.
ICM	Institute of Credit Management
IISec	International Institute of Security
IFIG	Insurance Fraud Investigation Group
IKD	Internationale Kommission der Detektivverberbande
ILEX	Institute of Legal Executives
IMGt	see MCMI
IOD	Institute of Directors
IoP	Institute of Paralegals
IPA	International Police Association
IPI	Institute of Professional Investigators
IPSA	International Professional Security Association
ITMA	Institute of Trade Mark Attorneys
IWO	Institute of Welfare Officers
JSN	Justice Support Network
Law Soc Exp Wit	Law Society Expert Witness
MCMI	Member of the Chartered Management Institute
MGPI	Medina Guild of Private Investigators
NAFI	National Association of Fraud Investigators
NAIPS	National Association of Investigators & Process Servers
NAIS	Global Investigators Network
NAPI	National Association of Private Investigation
NAPPS	National Association of Professional Process Servers
NEWPI	Online PI Network
NIRPOA	Northern Ireland Retired Police Officers’ Association
PIRC	Private Investigators Registration Council
RMPA	Royal Military Police Association
SAI	Scottish Association of Investigators
SAPI	Streetwise Association of Private Investigators
SCI	Security Consortium International
SIA	Security Industry Authority
SMASO	Society of Messengers-at-Arms & Sheriffs Officers (Scotland)
SOA	now renamed HCEOA
Syl	The Security Institute
UKPIN	UK Professional Investigators Network
UKPSA	UK Process Servers Association
UKPSN	United Kingdom Process Servers Network
UPID	The Union of Private Investigators & Detectives
WAD	World Association of Detectives
WAPI	World Association of Professional Investigators
WIN	World Investigators Network