If you do not notify EuroParcs of the rental weeks in writing on time, EuroParcs may choose to (1) retain the standard 2 rental weeks (last week of July and first week of August) or (2) not rent out the recreational property. If EuroParcs decides not to rent out the property, the owner is not entitled to the rental guarantee. In both cases, you remain obliged to pay all costs, including the Rental Service Package.