You may see Equipment Damage Waiver or EDW listed on some documents.
The equipment damage waiver is an optional non-refundable €17.50 charge that protects you against any minor damage/breakages to your accommodation and its contents during your stay. If you decide to pay the waiver you will only need to pay this once even if you are staying at multiple parcs.
If you decide not to opt for the waiver, you will be obliged to leave a €100 deposit with your holiday representative on arrival at each parc you are staying at. The deposit will be returned to you in full providing everything is intact at the end of your stay at each parc.