I disagree with many here .... and here's why:
1. observation (I am not talking about the outside, but the outside is part of the observation), so observation is permitted by Art. 5 of the law .... what does the law say simply "observation to obtain the necessary information in order to provide services ...." further, for example, I entered into an agreement with a client to identify the fact of disclosure of trade secrets by one of my client’s alleged employees .. ..in order to fulfill the contract, I carry out a type of detective activity that is permitted to me - monitoring the alleged “disclosure” of secrets, which leaves the office at lunchtime and goes to a summer, open cafe, where it meets one of the competitors of the client company and gives it a bundle. ..or a flash drive .... according to Art. 5 of the same law (On MF&D) I am allowed to quote: "in the implementation of private detective activities, the use of video and audio recordings, films and photo shoots ... that are not harmful to life, health, the environment ..." ... i.e. . if I monitor the alleged "divulger" of trade secrets and fix it on a camera or camcorder from my car, how he meets a person and passes him something and later it turns out that this is a client’s competitor ..... what I committed a violation of applicable law ??? no ..... these are of course general words and methods and it will differ or adapt to the individual characteristics of the client and the order ... but in general terms, it is possible to conduct monitoring, to record on the video of the observed object is also not prohibited .... (not you have to be wise here about encrypted video shooting - after all, a video camera in a man purse is also not a prohibited special tool) ...
2. if I got information about the meeting of the alleged disclosure with the competitor, and then, at my prompt, the client himself found the contact with the competitor in the electronic correspondence (on the work computer) of the disclosure and pressed him against the wall, he received confirmation of the disclosure of the secret from him .... why my client and I cannot speak in court and give such evidence if all our actions were carried out in accordance with the law ... that is, using the fact of observation and video recording in court (subject to a number of conditions specified by me) is not prohibited by law .. .