In the Roman Catholic Church, a coadjutor is a bishop with papal appointment as an immediate collaborator of the diocesan bishop in the governance of a diocese, with authority to substitute for the diocesan bishop in his absence and right to automatic succession to the diocesan see upon death, resignation, or transfer of the incumbent diocesan bishop. The diocesan bishop "must" appoint the coadjutor as vicar general and "must" "entrust to him before others" acts that require a special mandate. The coadjutor holds the title of "Coadjutor" of the see, and the coadjutor of an archdiocese has status as an archbishop. In recent years, the Vatican has stopped the former practice of assigning titular sees to coadjutors of dioceses.