Postpositions are words that don’t have meaning alone and gain meaning used with verbs and nouns. There are two types of postpositions; noun postpositions and verb-basis postpositions. Noun origin postpositions are formed by ading possessive suffixes to the names. Verb origin postpositions are formed by ading verb suffixes to the verbs. The postpositions that we witnessed the through the first written sources of the Turkish language appear as structures that were formed in the periods before the written sources. These words, which are originally in the form of nouns or verbs, have functions as nouns, adjectives, adverbs and conjunctions in the sentence through texts developed on the basis of various religions and teachings of the Turkish languge during Turkish language’s historical periods. In this view, this paper was created based on the evaluations based on the apparence of the tapa expression, which was first seen in the texts of Orkhon Turkic, known as the period of the inscriptions. In this study, it has been focused on the word tapa which is originated from the verb tap- “to find”. Firstly, a general investigation was carried out in terms of historical and contemporary Turkish dialects starting from the Old Turkic inscriptions about the tapa postposition. Then, some examples of fonetic forms and usage patterns of historical and contemporary Turkish dialects were given about the tapa postpositions. According to the used examples, the state suffixes in historical and contemporary Turkish dialects of the tapa postposition, its usage patterns and phonetic forms were tried to be revealed.