[2] Balázs first appeared in a contemporary document in 1475, when Matthias Corvinus, King of Hungary confirmed the previously inherited and acquired villages and estates of the Csányi family in Zala (for instance, Csány, Tilaj and Bocfölde), Somogy (Vörs) and Vas Counties (Nagytilaj).
In 1496, he filed a lawsuit against his relatives through his maternal grandmother Anna Egervári in connection with an inheritance dispute over lands in Zala, Vas and Križevci Counties.
[6] Along with co-envoys György Kerecsenyi and András Kaczor de Lak, he represented Zala County in the Diet of Rákos (1505), where the delegates passed a bill which prohibited the election of a foreigner as king if Vladislaus's died without a male issue.
[7] According to historian Irén Bilkei, Csányi again served as vice-ispán of Zala County in 1511, but his name did not appear in archontological lists in that year.
[7] As a tax registration from 1513 preserved, Csányi had seven porta (or peasant household) and resided in Csány in a stone-built manor house, which later was enlarged to a fortress by his son Ákos in the middle of the 16th century.
[7] Alongside Detre Rajki, he was referred to as "the king's man" in 1516 during an investigation of a suspected violation of law by Tamás Pető de Gerse.
[8] In the same year, as one of the representatives of the lesser nobility (the so-called noble jurors), Csányi was elected to the royal council of the young Louis II of Hungary, who ascended the throne shortly before.
On 3 July 1520, King Louis II commissioned Csányi, among others, to investigate the report of the Buda Chapter, which complained that László Kanizsai's soldiers attacked its serfs in the chapel estates of Karos and Galambok.
According to an undated letter of his son Ákos to his lord Tamás Nádasdy, his father Balázs Csányi and two of his brothers, István and Gergely died of a plague which had broken out following the Ottoman campaign and the Siege of Kőszeg in the summer of 1532.
[13] Based on a document of fragmentary genealogical data from the early 16th century,[9] Irén Bilkei claimed that Csányi married an unidentified lady from the Sárkány de Ákosháza family.
[8] Ákos, whose collection of 500 letters to Tamás Nádasdy is one of the most important primary sources of the 16th-century Hungarian history, married Anna Sitkey, they had a daughter Orsolya.
[8] At the county assembly of 9 December 1524, his niece Orsolya (daughter of Miklós I Csányi and Veronika Rajki) filed a lawsuit against him for her mother's dowry and morning-gift.