This paper investigates the phenomenon of corroboration in the surat (a chapter in the Glorious Quran) Yousif that forms the corner stone in conducting the dialogue throughout this sura.This phenomenon plays a vital role in showing the hidden meanings behind the dialogue among characters inthis sura.This paper involves a prelude in which the term Tawkeed confirmation is tackled linguistically and logically. Also it investigates corroboration styles used. They are classified into two parts: firstly, the verbal corroboration, and secondly corroboration via certain expressions that include various meaning.Finally, it includes conclusions in addition to an appendix clarifying the positions in which corroboration styles have been used.