Nowadays, with microchipped keys that need reprogramming, losing, or indeed having your car hire keys stolen, losing your keys can be not only inconvenient but very costly. Replacements can be expensive; one reporter had to pay £250 for a new set.
Insurance for such an eventuality can be obtained through many of the companies on the MoneyMaxim car hire insurance comparison service. With some firms including this as part of the package and with others it's an optional extra.
Do always check with your car hire company first once you realise you have lost your keys as they may want to use a particular service and you could end up paying for two sets of replacement keys.
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If you have any queries, do call a member of the MoneyMaxim car hire insurance team.