# Confirmation

> A measure of how many blocks have been added on top of a transaction's block. More confirmations mean stronger settlement.

Canonical URL: https://fudfomo.co/glossary/confirmation
Source: What The Block! Dictionary v1.0 (last updated 2026-04-25), browsable at https://wtb.fudfomo.co.

## Definition

A confirmation is what you have once your transaction has been included in a block. Each new block added on top counts as another confirmation.

The more confirmations a transaction has, the harder it would be for an attacker to reverse it. Exchanges often require a few confirmations before crediting deposits, with the exact number depending on the chain and the size of the transfer.

## Related terms

- [Block](https://fudfomo.co/glossary/block): A bundle of transactions added to a blockchain together.
- [Transaction](https://fudfomo.co/glossary/transaction): An instruction recorded on a blockchain that moves value or runs a smart contract.
- [Finality](https://fudfomo.co/glossary/finality): The point at which a transaction is considered settled and unlikely to be reversed.

## See the full catalogue

What The Block! covers more than 2,000 plain-English crypto terms, delivered as embeddable hover-state tooltips for crypto exchanges. https://wtb.fudfomo.co