Zero Confirmation Transactions: Faster Bitcoin Payments
Zero Confirmation Transaction is an alternative wording for an unconfirmed transaction.
What are Zero Confirmation Transactions?
Every transaction must be included in a block in order to be validated by the network as a valid funds transfer. Transactions carried out at the same time are collected into blocks that together form the blockchain.
Confirmation may be delayed if the fee for the transaction is not high enough for miners confirming transactions, or if there is a large volume of transactions waiting to be processed. Transactions with zero confirmation are also known as unconfirmed transactions.