YES.

The shadowing and surveillance of a person they are lawful if such checks to be a detective agency or a private investigator legally authorized in the exercise of a survey conducted on a regular power of attorney appointment of a client who has to protect its rights in court. To make the shadowing and surveillance of the person to be monitored, it is necessary that the investigation agency operates with the utmost discretion and professionalism, without causing any discomfort or interference in the private life of the person stalked and watched. If the shadowing and surveillance of the person on it is going to be discovered, the investigator must necessarily terminate activities to avoid the crime of harassment or annoyance to persons. (Art. 660 cp.). The shadowing and surveillance of a person to control,

For stalking and monitoring contact  Phersei