When you pick up your Fetch truck, on the day of your reservation, a security hold will be placed on your credit card. This is not a fee. (It is very similar to the damage and incidentals hold that hotels will place on your credit card.) It is 100% refundable back to you if you return your vehicle without any damage.
Once you have returned your Fetch vehicle without any damage, your security hold will be released within 7 days.