Detektiv pomaga stranki, da hitreje in lažje pride do informacij/podatkov, ki jih potrebuje. Večkrat stranke tudi ne morejo ali ne znajo rešiti določenega problema ali ugotoviti dejanskega stanja. Pri ugotavljanju dejanskega stanja na osnovi dokazov, so detektivom v veliko pomoč upravičenja, ki jih lahko pri svojem delu uporabljajo v skladu z Zakonom o detektivski dejavnosti (2011). Dokazi (strokovno detektivsko poročilo, fotografije, posnetki in ostali dokazi), ki jih zberejo detektivi, potem obveljajo na sodiščih, kjer lahko detektivi tudi pričajo. Zelo pomembno je, da detektivi pri svojem delu upoštevajo načelo zakonitosti, kajti opravljanje detektivske dejavnosti lahko pomeni tudi poseg v človekovo zasebnost oziroma njegove pravice in svoboščine. Na podlagi analize virov, sodne prakse in intervjujev je bilo ugotovljeno, da gre pri detektivski dejavnosti pravzaprav za poizvedovalno dejavnost. Kajti pojem poizvedovalna dejavnost se navezuje na preiskovanje, iskanje, sledenje, ugotavljanje, povpraševanje, odkrivanje in zaznavanje. Največkrat pa se omenja kot delo zasebnih preiskovalcev in detektivov. Zaradi tega se ne sme dovoliti, da osebe registrirajo poizvedovalno dejavnost brez predhodnega izpolnjevanja pogojev po Zakonu o detektivski dejavnosti (2011). To pa zaradi tega, ker je detektivska dejavnost regulirana dejavnost, kar pomeni, da je potrebno pred registracijo izpolnjevati določene pogoje. Tako je nesprejemljivo, da nekdo brez pogojev registrira poizvedovalno dejavnost in opravlja detektivske storitve. Zakon o varstvu osebnih podatkov (2007) dopušča, da osebne podatke preko kontrol bolniških odsotnosti lahko zbirajo tudi nedetektivi, če imajo registrirano poizvedovalno dejavnost, kar je v nasprotju z vsem prej naštetim. Glede tega je bilo izdanih več nasprotnih mnenj, leta 2007 so to lahko opravljali le detektivi, v mnenju informacijskega pooblaščenca leta 2013 pa kar naenkrat vsi, ki imajo registrirano poizvedovalno dejavnost. Ker pa pod poizvedovalno dejavnost spada detektivska dejavnost in pa tudi kontrola bolniških dopustov, lahko zaključimo, da lahko kontrolo bolniške odsotnosti opravljajo le osebe, ki izpolnjujejo pogoje po Zakonu o detektivski dejavnosti (2011). S pridobivanjem osebnih podatkov se namreč ne bi smel ukvarjati vsak, ki se samo registrira. Nenazadnje je pomembno tudi varovanje osebnih podatkov, kar z nižanjem standardov vsekakor ni mogoče oziroma ne more biti zagotovljeno. Zato morajo pristojni organi predvsem v zvezi z registracijo nekaj spremeniti oz. preprečiti tovrstne registracije. Detective helps a client, to obtain information/data needs, faster and easier. On several occasions clients can not or do not know how to solve a particular problem, or to determine the facts. When determining the facts, based on evidence, a detective can assists himself at his work by using Private Detective Services Act (2011). Evidence (professional detective report, photos, recordings and other evidence) collected by detectives then prevail in courts, where detectives can also testify. It is very important, that detectives at their work respect the principle of legality. Performance of detective work can also mean interference with a person's privacy or his rights and liberties. Based on analysis of resources, jurisprudence and interviews, it was found that detective activities are a case of reconnaissance activity. The concept investigation activity is related to search, retrieval, tracking, identifying, inquiry, detection and perception. Most often it is referred to as: the work of private investigators and detectives. For this reason, it should not be permitted, that a person could register reconnaissance activity, without meeting the conditions of Private Detective Services Act (2011). Detective activity is regulated, which means that prior to authorization, certain conditions must be fulfilled. It is unacceptable, that someone without conditions registers reconnaissance activity and performs detective services. Personal Data Protection Act (2007) allows that personal data via absenteeism control may be collected by non detectives, if they have registered reconnaissance activity, which is contrary to all previously listed. Altogether several conflicting opinions were issued. In 2007, control of sick leave may be carried out only by detectives. In 2013 in the opinion of the Information Commissioner, suddenly the control of sick leave can be performed only by those who have registered reconnaissance activity. Under reconnaissance activity we find detective activity and also control of sick leave. We can conclude, that control of sick leave can be performed only by persons who qualify under Private Detective Services Act (2011). With the acquisition of personal data should not engage anyone who just registers. Finally, it is important to protect personal data, which by lowering standards certainly is not possible or can not be guaranteed. Therefore, the competent authorities must change something in relation to these registrations or prevent this type of registrations.