How Does a Transaction’s Confirmation Status Relate to Double-Spending Risk?
The risk of a transaction being reversed (double-spent) decreases significantly with each block confirmation it receives. A zero-confirmation transaction has the highest risk.
Once a transaction is included in a block and that block is followed by subsequent blocks (confirmations), the cost for an attacker to re-mine the chain and reverse the transaction becomes exponentially higher, effectively making the transaction more secure and final.
Glossar
Confirmation
Attestation ⎊ The term "confirmation" within cryptocurrency, options trading, and financial derivatives signifies a process validating a transaction or event, establishing its legitimacy and finality.
Confirmation Status
Definition ⎊ Confirmation Status quantifies the degree of immutability achieved by a cryptocurrency transaction, measured by the number of blocks appended to the blockchain after the block containing that specific transaction.