The main purpose of this paper is to develop a conceptual architecture of a software system that would support the postal sector and its operations, primarily focusing on the customs procedure in the postal logistics operations. The paper also describes the implementation of a software solution based on the proposed architecture. The main driving idea behind this paper is the use of contactless technologies to aid the exchange of data used in the postal sector. The paper contains a comparison between the traditional technologies used in the postal sector and the ones proposed by the author. The concept of data storage on these contactless chips is described in details, further focusing on the process of reading, processing and writing the data to and from the chips. The three main components of the system are desribed in detail: application used for reading postal and customs data from the contactless chips, application used by customs officers to manage the procedure over individual packages and the web application used by importers that makes it easier for them to keep track of customs procedure over the goods they import and to regulate their duties related to it. The paper describes the use case of each component of the system and suggests further steps to be made that could maximize the potential achieved by implementing the proposed system.