We apologize for the inconvenience. Currently this section is available only in Italian
It is merely a pre-authorization by the banking circuit, which is reported to users that have activated a transaction notification service on their mobile device. Same thing happens when, for example, you refuel at a self-service station. Over the following 48 hours, the correct amount will be charged according to the taps you actually made and upon completion of this process, the undue amount will be reimbursed.
You might be able to see this operation after 3/4 working days, depending on the day of reimbursement and on the banking circuit that carries out the operation.