Tajny współpracownik (Secret collaborator) (TW) 1. [Security Service (SB)] the primary category of cooperation with the SB, specific to the "domestic" SB divisions (i.e. outside Department I of the Ministry of the Internal Affairs). The TW category was formally introduced by Operative Instruction No. 03/60 of 1960 in place of the categories ‘resident’ (liaison) (rezydent), agent and informant (informator). However, the term had already been used to designate any category of SB collaborator or in place of the "agent" category. A TW was "a person deliberately recruited to cooperate with the Security Service and perform tasks in the prevention, recognition and detection of hostile activity", in essence, a deliberate and secret informant and executor of SB orders. The TW recruitment was preceded by the so-called preparation (‘opracowanie’) of a ‘candidate’ for secret collaborator (kandydat na tajnego współpracownika, KTW). Documents related to the TW and their activities were collected in the TW personal dossier (teczka personalna TW) and the TW service dossier (teczka pracy TW). TWs were generally obliged to sign a written letter of obligation to cooperate. However, under certain circumstances (when the SB officer considered that "for operative reasons", convincing the KTW to write such an obligation might reflect on further cooperation, and the officer had certainty, confirmed by the declarations of the collaborator, that the latter was determined to deliberately and secretly cooperate with the SB, i.e. that the recruitment had in fact taken place – in particular, this applied to persons of established high social status, e.g. university teachers and clergy). In principle, members of the Polish United Workers' Party (PZPR) were not allowed to be recruited as TWs without the consent of the competent secretary of the provincial committee or the Central Committee, but they were recruited as an operative contact (kontakt operacyjny, KO), official contact (kontakt służbowy, KS) or consultant (konsultant); 2. [Internal Military Service (Wojskowa Służba Wewnętrzna, WSW)] the primary category of cooperation with the WSW, most often a professional soldier (non-commissioned officer, officer) or conscripted soldier, but also a civilian employee of the army or a family member of a soldier. Documents related to the TW and their activities were collected in the TW personal dossier and reports in the TW service dossier. In the WSW practice, the so-called simplified mode of documenting the recruitment of TWs was also applied; TWs recruited in this way did not have personal dossiers – but the so-called personal card of a secret collaborator of the WSW, and their reports were placed directly in the operative case-files. A WSW TW was required to sign a written declaration containing a letter of obligationto cooperate with the WSW and to keep the cooperation secret. In principle, it was forbidden to recruit WSW TWs among generals and officers on generals’ posts, commanders of military units from regiment upwards, political officers, military prosecutors and judges and secretaries of PZPR branches; members of the PZPR could only be recruited on a "voluntary" or "material" basis. The persons mentioned above could be recruited only with a consent of the Chief of the WSW, and with the consent of the Minister of National Defense (in the case of generals and officers on generals’ posts) or with the permission of the Chief of the Main Political Directorate of the Polish Army (in the case of political officers, secretaries of the PZPR, military judges and prosecutors), or based on a decision by the WSW chiefs of military districts (in the case of commanders of military units and members of the PZPR – the latter based on "dependency").