Is the rental deposit charged to my card?

No. The deposit is a hold, not a charge. The amount is simply blocked by your bank on your own card. Neither Volara nor Stripe holds this money as long as nothing is charged.

When the deposit hold is placed

The hold is placed at the start of the flight, not at the time of the agreement. This is normal: a card authorisation is only valid for a few days, whereas an agreement can be given several weeks in advance.

When it can actually be charged

Never on simple request. The owner must file a substantiated and justified claim. You then have a set period to contest it, after which Volara decides. The amount withheld is capped, and this sum goes to the owner, never to an insurer.

If all goes well

At the end of the rental, if there is no claim, the hold is released. Your bank frees up the amount and you regain full use of your card.