Erza and Mirajane visit Crawford, the former Magic Council chairman, and fall into Tartaros's trap. And in exchange for information on Tartaros, Doranbolt frees all the members of Oracion Seis!
That's how Tartaros found out about 
Face and the former members' addresses!
!هكذا علمت تارتاروس حول فايس وعناوين الأعضاء السّابقين