The Church requires that, for mortal sins, you specify the number of sins and the circumstances that may change the nature of the sin. For example, in the case of sins against the Sixth Commandment, simply saying, "I committed a mortal sin against the Sixth Commandment" is not enough because there are different types of sins against this commandment. If you are married, this is different from someone who is single, or if you are a priest with vows, and so on. There are different categories. Therefore, you need to specify the nature of the sin, but the Church does not require you to go into excessive detail. It is sufficient to explain the nature and character of the sin without elaborating on the details.
As for the number of sins, the Church doesn’t demand exact numbers unless it is something you clearly remember. The Church does not require you to expose details that may bring back unnecessary images or temptations. It is enough, I repeat, to specify the nature and character of the sin, and generally the number if possible. When you confess your sins sincerely without deliberately withholding anything, your soul is forgiven completely.
Later, if you remember more details, such as the number of sins, you can bring that up in the next confession. It is helpful to confess these details for the sake of your humility and repentance but remember, the sins were already forgiven because you did not intentionally conceal anything.
The important thing is that you did not deliberately hide anything. Once confessed, your soul is completely forgiven. If you later remember more details, you can confess them, but this is for the sake of further humility and repentance. You can also make a general confession of your whole life. Before doing so, it is helpful to pray to the Holy Spirit and your guardian angel for guidance. However, general confessions should not be done too often, as this may lead to scrupulosity or a lack of trust in God’s mercy.
Dear visitors of Gloria Dei and all who have already written or who will write a personal message to me. I am grateful for your attention, your kindness, for your spiritual support and especially for your sacrifices and prayers for me. God may reward you!