Yes. If you have received a confirmation email for your Rental Vehicle Excess (RVE) Insurance policy, your journey is confirmed and covered for your nominated date range.
The insurance sold by RVE Insurance is independent to the car rental companies.
It is a common tactic of car rental company staff to tell Customers that they have not heard of RVE Insurance or that the Customer is not covered by a third party protection product (RVE Insurance or another alternate product).
The rental desk staff are incentivised to up sell their own excess reduction products as that is often how they earn their personal bonuses and commissions.
The Rental Vehicle Excess Insurance confirmation email advises customers that you can collect your hire car without purchasing additional products from the car rental company.