Expert detectives in surveillance and monitoring

Surveillance and monitoring by professional experts

When carrying out surveillance and monitoring, we will start from the basis that people in general do not usually think that they are being followed or recorded. However, we will take extreme precautions at all times.

Our detectives are   experts in surveillance and monitoring of all kinds through the use of all kinds of media.
We use various cars used by expert driving professionals, always in support of high-capacity motorcycles driven by drivers specialized in driving them.


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Arga has a very diverse professional team that is in charge of the operation of all surveillance and/or monitoring in the most appropriate way possible, always making a detailed study of the place or to be monitored or of the individual to be followed.
For this we have a variety of personnel, both for follow-ups on foot, by public transport, plane, car, motorcycle, etc.
Our success rate for such investigations is virtually 100%.

We have many years of experience behind us and we are experts in such investigations.
If you are looking for a Detective Agency, we will give you the full guarantee of all surveillance as well as follow-up.
Surveillance or monitoring is not something that any person or professional can do if they do not have the necessary knowledge on the subject.
Do not leave surveillance or monitoring in the hands of just anyone, since a momentary mistake can lead to spoiling the entire investigation.
Arga, the Detective Agency, always carries out all its investigations with two fully experienced detectives on the subject. In addition, in all the follow-ups we use a large displacement motorcycle to support the vehicle.

If you want more information about contracting surveillance and monitoring Contact us
Our detective agency is an expert in surveillance and monitoring.

Contact us if what you need is professional treatment.

Surveillance and monitoring by professional experts

Surveillance and monitoring services are a basic service of all private detectives used to investigate.
Although at first glance it may seem simple to carry out surveillance and follow-up, the truth is that they are highly complex and highly specialized.

Great knowledge as well as great experience is necessary to be able to directly carry out a direct observation by the private detective.
There are many setbacks that we can find in the course of a direct observation during the exercise of surveillance and monitoring.


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The main problems that we can face in a sudden way are the following:

      • Poor planning of the environment.
      • Inadequate target study.
      • Circumstances of the workplace. When near work there are official institutions or other organizations such as barracks, police stations, houses of personalities with escort, heavily guarded institutions, etc.
      • Not being informed by our clients that the investigated person suspects that a detective has been assigned to him.
      • Having previously been caught by the client himself by the person under investigation for having been following him.
      • Having hired detectives who have carried out a disastrous surveillance and have been discovered.

However, for a surveillance and monitoring device to work properly, it is important to have two factors:

Permanence time

This is because in the vast majority of cases it is necessary to wait long periods of time.
Our detectives have a great preparation in surveillance and monitoring, they are taught to persevere.
Our objective is to clarify the doubts of our clients without there being a hint of error, avoiding interpretations at all times and strictly adhering to reality.

The use of GPS by private detectives in surveillance

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The subject of the use of GPS by private detectives is a topic of debate that is not very clear and that many clients and users ask us about it.

Grupo Arga Detectives wants to talk about it and how our private detectives use it when monitoring a private investigation.

The use of it as a general rule is prohibited by regulations and by jurisprudence withdrawn over the years.
Its use should be restricted to a few uses in private investigation provided that all the legal formalities that must deal with the principle of proportionality are met.
As a general rule, therefore, there is no room for its use indiscriminately.

Its use is rather when there is authorization from the owners of a vehicle and they want to know where their vehicle is going.

For example, it is the case of a taxi driver who rents his vehicle to a driver and wants to know if he is really working and places a geolocation system on his own vehicle.

Its use must be completely temporary and strictly necessary, with just enough time for the duration of the private investigation.

It is therefore clear to point out three important points about the use of GPS by our detectives:

  • Its use as a general rule in a systematic and indiscriminate way is not allowed.
  • When making use of it within the cases permitted by law, the time should be the minimum possible and only while the private investigation lasts.
  • Its use and application will be governed by the principles of necessity and proportionality.
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    Surveillance and follow-up methodology

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    Surveillance and follow-up in rural areas have a special consideration due to their riskiness.
    People in the villages know each other, they know the cars there are and they control outsiders very suspiciously.
    It is very normal for the neighbors themselves to call the Security Forces and Corps when they see private detectives roaming the area.
    It will be very frequent to see the old people of the place walking with the cane and controlling the entire area in an amazing way.
    We must remain camouflaged in our vehicles at all times without leaving them.

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      Before carrying out all types of surveillance and monitoring, we must carry out an action plan correctly. To do this, we must carefully study the entire area as well as all possible escape routes.

      This study will take place at two points.

      I study in the office through google view type maps and other similar ones.

      Street study in the place itself and always before starting the private investigation.

      We will have to study all those points likely to shelter the private detective when he is carrying out surveillance and monitoring.
      Whenever we can, we will get as far away as possible from the subject to be investigated.

      To have a good visualization we will use binoculars and other similar zoom devices.

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      When we carry out surveillance on foot, it is a good idea to buy a newspaper and sit on a bench and pretend to read to go unnoticed. In the event that we could not have a newspaper we could take some advertising pamphlet.
      The devices that we take to investigate will be placed among the papers so that they cannot be seen.
      The mobile phone is also an element that allows us to go unnoticed by being able to hide when we speak on it.

      When the surveillance is prolonged over time, it will be advisable to change the place every 50 or 55 minutes so as not to raise suspicions from the neighbors.

      We will take care not to expose our recording equipment continuously, removing it only when strictly necessary.

      When we have to use it, we will have to assess whether or not we run the risk of taking it outside and exposing it. We will never take them out without thinking about it.

      It is important when collecting everything that happened to write down in detail everything that happened either in a recorder or with a pen and paper, we should not memorize as a general rule.

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      The vehicles carried out in this type of private investigation by our detectives have tinted windows.

      It is advisable to sit in the back to go unnoticed. It is interesting sometimes to use some kind of black sheet to cover us if we need it. We will slide said sheet over the back of the seats so that it is as discreet as possible.

      It is interesting to use the sun visor in the front part to give the sensation to the curious that the car has been parked for a long time.

      It is important not to have distractions while you are watching so as not to lose any detail of the circumstances.


      We should not get out of the vehicle as a general rule so as not to attract attention.
      In surveillance on foot, when they are prolonged over time, we must wear two pieces of clothing in such a way that we interchange them so as not to arouse suspicion.
      When we are inside the vehicle we will try to wear dark clothes and we will avoid bright or white clothes.

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      Advanced techniques in surveillance and monitoring

      Now we are going to list a series of recommendations at an advanced level to take into account when carrying out surveillance and monitoring.

      Detective men will start not shaving us a week before the investigative service with the intention of growing beards. At a given moment in the course of the investigation, we will be able to shave in order to change the look .

      To withstand the strong summer heat inside a vehicle, we must take cold drinks inside the vehicle as well as a cloth to dry our sweat.

      We will have to control the drops in sugar when we have been inside a vehicle for a long time, so we must take some type of food that contains some sugar.

      In the breaks we will be careful not to make them next to the area where the investigated is located, we will move away from the area until we avoid any type of direct visual contact by the investigated towards our person.

      Before we start a private investigation, we’ll fill the gas tank completely.

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      Detective Traits for Surveillance and Trace

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      For many people, the function of the private detective in Spain seems to be unclear. It is important to make this profession known correctly through knowledge of its regulations in order to know its regulations.
      It should be remembered that private investigation services are a service for individuals or companies that have a legitimate interest.

      Grupo Arga Detectives is characterized by its clarity and transparency in all phases of private investigation.

      From the initial reception of clients, to the planning of investigative operations as well as in the preparation of reports and their subsequent judicial ratification.



      The private investigation services that our detectives can carry out in Spain are very diverse.
      The work of the private detective is distinguished by:

      • be a discipline
      • Require a methodology in its development and obtaining evidence.
      • Be extremely planned.
      • It will need to be reflected later in a report.
      • One of the most important plots of the private detective profession takes place on the street.

      Every private investigation service must meet four characteristics:

      • Planning.
      • be farsighted
      • Need to collate the evidence obtained.

      On the other hand, surveillance is characterized by:

      • Its great dilation in time.
      • Being enveloped in boredom and tedium.
      • That the professional is competent.
      • The need for the detective to be disciplined.
      • Ability of the professional to record at the precise moment.
      • Detective’s ability to go unnoticed.
      • Need constant attention.

      Private detectives have to fight against different factors such as extreme heat or cold, physiological needs.
      It is therefore important to rotate the private detectives every few hours so that the ability to concentrate is not lost as well as so that they go unnoticed. It is also important to move the vehicle.

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        Usefulness of surveillance and follow-up 

        Arga detective has a very experienced group of  expert private detectives who carry out surveillance efficiently through different methods depending on the situation.

        In the same way, it can be about domestic investigations and infidelity, in these situations a lot of discretion is needed thanks to the commotion that these situations have in a family.

        The surveillance investigations carried out by the professional investigator can be useful for court cases as legitimate evidence, whether it is for a divorce, child custody or alimony.

         Grupo Arga Detectives  can carry out monitoring behaviors with the ability to continue and control the actions of certain people or sites, with family, business, and other objectives.



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