What If I Forget a Sin in Confession?
Confession Guides
Honestly forgetting a sin is different from deliberately hiding it. After sincere preparation and an otherwise valid confession, an unintentional omission does not mean you must panic or repeat the entire confession.
If you remember afterwards
Mention a remembered grave sin at your next confession, explaining that you forgot it previously. If you are unsure what happened, or think you deliberately withheld something serious, tell a priest and let him guide you.
Three different situations
| What happened | What to do |
|---|---|
| I genuinely forgot a grave sin. | Mention it at the next confession; explain the omission was unintentional. |
| I knowingly concealed a grave sin. | Tell the priest about the concealment and ask how to make a good confession. |
| I have a vague fear that something was missing. | Discuss that uncertainty with your regular confessor; do not invent sins to satisfy a feeling. |
Do I need an exact number?
Be honest about what you remember. If an exact count is impossible, give a reasonable estimate or explain a pattern. False precision does not improve the confession.
Can I receive Communion?
A genuinely forgotten sin in an otherwise valid confession does not by itself undo absolution. If there is another reason to question your disposition or the validity of the confession, ask a priest. Do not use this general explanation to dismiss deliberate concealment.
When worry keeps returning
Repeatedly reviewing the same confession can make uncertainty feel worse. Follow the guidance of a regular confessor, particularly if you struggle with scrupulosity. A webpage cannot replace that continuing pastoral relationship.
How to go to confession · Prepare with an examination of conscience
Sources and further reading
Prepared by Catholic Repository. Sources checked 12 September 2026. A lay educational resource, not an official Church publication.