After the assassination of False Dmitriy I, Ignatius was removed from his see and confined in the Chudov Monastery by the order of Tsar Vasili IV.

In April this year the patriarch Hermogen, consistently calling on the Russians to participate to arms and the expulsion of the Poles from the country was thrown into prison in the Chudov Monastery.

Polish King Sigismund III Vasa hoped that in the future will be able to renew war with Russia, and intended to use the former patriarch person Ignatius was taken to Vilnius and settled in the Holy Trinity Church of the Basilian Monastery.

At that time he also converted from Russian Orthodoxy ("the Disunia") to Byzantine Rite Catholicism ("the Unia"), thus entering into full communion with the Pope.

Due to his active role in the installation of False Dmitriy I to the Moscow throne and later conversion to the Unia, Ignatius has suffered from damnatio memoriae in subsequent ages and often is not counted among the legitimate patriarchs by the Russian Orthodox Church.