The earliest - and only - reference I can locate to illegality was in an article by Levy (In this post I will expose and prove how the so called journalist 'Duarte Levy' is nothing more than a con man, a swindler and a dangerous pathological liar.)
http://joana-morais.blogspot.com/2009/06/exposing-swindler-truth-about.html There are numerous firms advertising Private Investigations in Portugal …
even missing person searches.
I think it is therefore logical to assume that PI per se are not illegal in Portugal and are just another myth originating from suspect sources.
Just four cites from many ...
We have been established in
Portugal since 1992 with offices in
Lisbon, the
Algarve and London. We undertake various investigations into all manner of subjects throughout the world and have agents throughout
Portugal, the United Kingdom, Brazil and Angola.
http://www.private-investigator-detective.net/private-investigator-detective-lisbon-portugal.htmlWe are handling private investigation services in
Portugal and other parts of world. The region of
Portugal is looked after by our international associates/partners firms who are well-established with network, highly reliable & trustworthy and experienced to provide our comprehensive investigative and intelligence services according to the locale.
http://www.grevesgroup.com/portugal.htmlPortugal InvestigatorsIf you need investigators in
Portugal, please fill out the form below and PInow.com will find an investigator who can assist you.
http://www.pinow.com/investigators/intl/portugalRECENT PORTUGAL INQUIRIESOrigin Investigation Location Client Type Case Type
South Africa
Portugal Individual Clients (Personal Cases)
Missing PersonsTenessee
Portugal Individual Clients (Personal Cases)
Missing Personshttp://www.icsworld.com/Find_Local_Private_Investigator/Portugal.aspx