It is one of the Mysteries of the Church. It is officiated by the Bishop or the Priest, who has to be canonical and belong to one of the Autocephalous Orthodox Churches.
Church Life
Fasting accompanied with prayer and charity helps the Christian both spiritually and physically. Our Christ was fasting. The Prophets, the Apostles and all the Saints were fasting. Every Christian should fast.
Only a Bishop or a Confessor Priest can receive a confession. It is a soul saving Mystery.