Alienation or theft as an unwanted but constantly present social activity that museums face has a thousand-year tradition. In recent years, we can witness an increasing number, as well as the expansion of criminal offenses in relation to cultural goods and works of art and the profit they bring. It is very important to point out the multitude and variety of forms of these criminal acts as well as the multitude involved in them. Alienation of art and cultural property can be defined as a set of criminal acts related to cultural property, i.e. art. Such crimes include destruction of cultural property, looting of archaeological sites, art theft and forgery, and illegal trade in cultural property and art. The impact of these criminal acts is visible on a social, economic, cultural and political level. The consequences of these criminal acts point to the fact that this is a serious problem of global proportions. The topic is very important and serious because the endangerment of cultural heritage is a problem that concerns all of us, and it especially concerns the endangerment of cultural heritage. In this work, emphasis would be placed on the research and analysis of documentation in the function of protection during alienation. Ways of documenting the missing materials, which are of essential importance in order to establish a high level of security and protection of cultural assets, would be explored. In addition to examples from around the world, the state and trend of this rate of criminal offenses in the Republic of Croatia will also be presented. The paper will also cover the topic of communication during alienation, that is, reporting to the public during such events, as well as all other forms of communication that can be used to problematize this topic.