Accordingly, his son Nicholas would be the sole heir of Salgó Castle (Börzsöny), which was acquired by Simon alone decades earlier, while Tapolcsány (today Topoľčany, Slovakia) belonged to Frank's branch.
The remaining two castles (Somoskő and Bene) and the surrounding villages became a joint family property, while both branches had to appoint an own castellan, simultaneously.
Mainz citizen Eberhard Windecke also claimed that Nicholas was responsible for the death of Ladislaus' namesakefather, accusing him of poisoning, but contemporary official documents do not confirm this assumption.
[5] He even tried to pass the castle of Hegyesd as a titular pledge to the penniless Nicholas, which he inherited through maternal side in 1426, however Simon Rozgonyi, Bishop of Veszprém and his brothers reported his intention to the royal court.
As a result, Sigismund, who has been abroad for years, forbaded to Ladislaus to donate the fort to his relative, in his letter written on 25 September 1433 in Mantua, while travelled to the Council of Basel.
The 21 villages, which belonged to the Ajnácskő lordship partly or fully, in addition to a half of Rimaszombat (today Rimavská Sobota, Slovakia) were donated to Ladislaus Szécsényi.
[14] According to the document, Nicholas bequeathed to Ladislaus all his "castles, small towns, villages and all other immovable property", in addition to 10 percent of his money.
[15] Albeit he sent a Franciscan friar to Venice, where his deceased relative spent his exile years, but after that he learned that he gained nothing, as Nicholas had bequeathed to him lands he no longer owned.
[17][18] His term was characterized by the Hussites' permanent invasions into Upper Hungary, including the two aforementioned counties, who constantly looted the villages and plundered the region.
[19] Amid such a situation, he supported Władysław III of Poland's claim to the Hungarian throne during the civil war, which broke out after Albert's death.
The local nobles concluded their first two armistices with Queen Elizabeth's mercenaries Hasko Schellendorf then John Jiskra in his estates Szécsény and Hollókő on 9 October 1441 and 17 September 1442, respectively.
[21] In September 1443 at Nowa Wieś Spiska, Szécsényi was among the lords, who signed an armistice with John Jiskra, de facto ruler of Upper Hungary and a partisan of the infant Ladislaus the Posthumous.
He and his son John appeared before the Convention of Ipolyság (today Šahy, Slovakia) on 27 October 1454, when they pledged a considerable part of the Szécsényi wealth (for instance, Hollókő, Szécsény, Gyöngyös and Pata) for sixteen thousand florins to his son-in-law Albert Losonci.
Still in that year, the mourning father made a declaration at Ipolyság, which contained if he dies without male heirs, his two surviving daughters, Hedwig and Anne will inherit his wealth after their promotion to the status of a nobleman's son.
His funeral was attended by his extensive kinship, including Palatine Michael Ország, Judge royal Ladislaus Pálóci and Albert Losonci, Szécsényi's son-in-law and successor as ispán of Nógrád County.