The aim of the article is to show the role of the prefixe post in the construction of discursive identity of actors described with a country name or its reformulation in the French media discourse. The observation of uses of this prefixe added to the the adjective sovétique (Soviet), which completes a proper name or its discursive reformulation (such as état/pays/espace – state/country/space), allowed to distinguish the most common effects of the use of post: the referential blurring, which contributes to the creation of the collective identity of the agents, the memorial character of the adjective postsoviétique, which constructs the discursive identity of agents by constantly recalling the past, as well as the appearance of the adjective in proximity to axiologically marked structures.