Originally Posted by Gary Coughlan

Hi,

We do take an approval on the credit card at the start of the hire, this is a security to ensure that funds are available to pay for any non reserved extras, such as missing fuel, extra days, damage excess etc.

The fact that the transaction was on the first day of the rental suggests that this will be the explanation that fits your query. Please let me know if you still have any concerns and I will contact Sixt Italy on your behalf.

Gary - Sixt Customer Service Team