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Name one thing that makes confession lawful.
Any of the following:
Examine your conscience and count your sins which you made against the Lord and others;
Confession should be to a priest (John 20:23);
Feel how ugly and horrible sin is. You should repent and have the intention of not returning to it through the grace of God;
You should come to the priest, bow before him, make the sign of the cross, say the Lord’s Prayer, and confess your sins precisely without hiding any sin;
You must not mention any names during confession lest you should reveal their mistakes;
You should obey the priest and follow his advice.