Once a user is prompted to sign a transaction with their wallet, the transaction is then sent to be confirmed by the blockchain operators. Usually, this process is not instant because it takes time for different computers to confirm the same transaction (ensuring a high degree of confidence in your transaction). Refinable takes a standard 3 block confirmation approach before acknowledging a transaction has indeed, safely gone through. All this data can be verified on the block explore such as Etherscan, Bscscan, and Polyscan.