The author attempts to discuss the issues connected with crimes which are being committed via the Internet in the paper synthetically, beginning with differentiation of terms: „computer-related crime”, „Internet crime” and „cybercrime” by presentation of exemplary methods of action of perpetrators of „Internet crimes” with the example of the so called „classic fraud” from article 286 § 1 of the Criminal Code and „computer-related fraud” which is listed in the category of computer-related crimes from article 287 § 1 of the Criminal Code.