He was sent by it to Denmark, to win over the king and the people, and assisted in the deposition (1439) of Pope Eugene IV and the election of the antipope Felix V. Excommunicated by the Archbishop of Magdeburg he appealed to Rome.
In 1461 he resigned his office and spent the last years of his life in literary work at the convent of Kyritz.
Döring was said to be the author of the Confutation primatus Papae, written (1443) anonymously and without title.
It is in part an extract from the Defensor pacis of Marsilius of Padua (printed in Goldast, Monarchia, I, 557 sqq.).
Other works attributed to Döring are Defensorium postillae Nicolai Lyrani, against the Spanish bishop, Paul of Burgos, since 1481 frequently printed with the Postillae; Liber perplexorum Ecclesiae (lost); continuation (1420 to 1464) of the Chronicle of Dietrich Engelhus.