Although as a general rule, Mokkan was carried out upon receiving the emperor's special permission, Heike Mokkanryo (Land rights confiscated by Kamakura bakufu from the Taira family) during the time when the Emperor Antoku was kidnapped by the Taira family in Jisho War was carried out upon receiving the permission from the Cloistered Emperor Goshirakawa.
没官は原則として天皇の宣旨によって行われていたが、治承の乱において安徳天皇が平家に連行された最中に行われた平家没官領の没官は後白河法皇の院宣によって実施された。