Criminal Code: Whosoever unlawfully stalks a person by 1) seeking his proximity, 2) trying to establish contact with him by means of telecommunications or other means of communication or through third persons, 3) abusing his personal data for the purpose of ordering goods or services for him or causing third persons to make contact with him, 4) threatening him or a person close to him with loss of life or limb, damage to health or deprivation of freedom, or 5) committing similar acts, and thereby seriously infringes his lifestyle shall be liable to imprisonment not exceeding three years or a fine.
Violence Protection Act: a person unlawfully and with intent unreasonably harasses another person in that he repeatedly stalks that person against that person's expressly stated wishes or hounds that person by means of telecommunications.
Legal Source
Criminal Code, Article 238 and Violence Protection Act,Article 1 Paragraph 2
Observations
First defined in Germany in Protection Against Violence Act of 2002 which made protection orders available for stalking.