Example below from AVIS:-
Insurance coverage
Collision damage waiver (CDW): Includes 20% tax; Excess 840 EUR
Personal accident insurance: 5.8 EUR per day. (Excludes tax)
Theft waiver (TW): Includes 20% tax; Excess 840 EUR
Third party liability protection (TP): Includes 20% tax
The Excess Liability is the amount determined by the car rental supplier for which you can be held liable in case of damage/theft of the vehicle. Damage to or loss of tyres, windscreens, glass and undercarriage may not be covered by the CDW (Collision Damage Waiver). Please check with the rental agent at the desk.
If you purchase the Excess Reimbursement Insurance from a third party, the main driver will be required to present their credit card at the rental desk in order for the car rental agent to authorize the deposit.