<p>It depends on the amount of ADA at risk.</p>
<p>Personally I would be happy with 3 block confirmations for a value of US $10, but would want more than that for US $10,000.</p>
<p>Rollbacks of more than 3 blocks are roughly once a year events.</p>

CC BY-SA 4.0
2024-03-21T10:42:44.303Z
Agree, DbSync waits two blocks before inserting in database, just for reference
Michele Nuzzi
CC BY-SA 4.0
2024-03-21T19:51:44.390Z
> Rollbacks of more than 3 blocks are roughly once a year events.


Are there any stats available on rollbacks?
uhbif19
CC BY-SA 4.0
2024-03-21T05:44:01.263Z
2024-03-21T05:44:01.263Z
Erik de Castro Lopo
<p>There is <code>k</code> finalization param in Ouroboros, but it is absolutely non-practical. It takes around 36 hours AFAIU.</p>

CC BY-SA 4.0
2024-03-17T13:16:45.243Z
Related questions: https://cardano.stackexchange.com/questions/8760/what-is-your-comfort-level-for-number-of-confirmations-and-why
uhbif19
<decentralized-applications><security>
What number of confirmations is considered secure in Cardano?
# What number of confirmations is considered secure in Cardano?

(Asked by: username_0 on 2024-03-17)

There is `k` finalization param in Ouroboros, but it is absolutely non-practical. It takes around 36 hours AFAIU.

**Tags:** decentralized-applications, security
> **Comments:**
> **username_0**: Related questions: https://cardano.stackexchange.com/questions/8760/what-is-your-comfort-level-for-number-of-confirmations-and-why  

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## 1 answers

### Answer by username_1 on 2024-03-21. Score: 3

It depends on the amount of ADA at risk.

Personally I would be happy with 3 block confirmations for a value of US $10, but would want more than that for US $10,000.

Rollbacks of more than 3 blocks are roughly once a year events.

> **Comments:**
> **username_2**: Agree, DbSync waits two blocks before inserting in database, just for reference  
> **username_0**: > Rollbacks of more than 3 blocks are roughly once a year events.   Are there any stats available on rollbacks?  

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