The idea of this work was processing problems of using QR (Quick Response) type of 2D codes in terms of their readability if they are intentionally, simulated damaged. Depending on the position of damage, and on its size will be defined readability or not of the code. This research will be conducted in the experimental part of work, while the theoretical part of work is conceived in a way that is solely based on the QR 2D codes, ways of reading, features and other specifications. Besides the mentioned types of the codes allegation and other types that are also in use like DataMatrix code, MaxiCode, Aztec Code, Code 1, Code 16k and many others which are in use just like QR codes. QR 2D codes are a kind of 2D symbology developed by Denso Wave company 1994. Unlike bar codes, 2D codes contain information in vertical and horizontal direction. QR code in this way has a much greater amount of information than the classic bar code. While convetional bar codes are capable of storing a maximum of 20 digits, QR code is able to store several dozen to several hundred times more information. Such codes are characterized by levels of correction, which enables the reading of the code that is up to 30 % damaged. The aim was to determine which areas of the code are the must vulnerable, given the position and size of simulated damage with adequate equipment.