I read somewhere the comment of a priest, that there is nothing so dead as a dead priest. What he means is that when priests die there is a tendency to canonise them immediately, because people think that such a good priest does not need any prayers for his soul. This even happens when they are alive. A priest asks someone to pray for them and sometimes the response is along these lines: ‘Father you don’t need my prayers. Say one for me instead’. This is simply not so. Everyone needs prayers.
A prayer for a deceased priest
O God, Thou didst raise Thy servant, N., to the sacred priesthood of Jesus Christ, according to the Order of Melchisedech, giving him the sublime power to offer the Eternal Sacrifice, to bring the Body and Blood of Thy Son Jesus Christ down upon the altar, and to absolve the sins of men in Thine own holy Name. We beseech Thee to reward his faithfulness and to forget his faults, admitting him speedily into Thy holy presence, there to enjoy forever the recompense of his labours. This we ask through Jesus Christ Thy Son our Lord. Amen.