Cryptocurrency transactions are confirmed on the blockchain. This means that the transaction ID is sent to a pool of other transaction where it gets picked up and confirmed. Only then does the transaction appear on the blockchain. Since only a certain number of transactions can be confirmed per second, times of congestion may occur. During such congestion times completion of transactions can be severely slowed down, so that it may take from a few hours up to several days before a transaction can be picked up and confirmed. Should several days have passed and you are still unable to find your transaction in the blockchain contact us under support@bitblinx.com.