Losing the key or essential documents of a rental vehicle in India can be inconvenient and may incur additional costs. Here’s how to handle such situations:
Immediate Actions:
• Contact the Rental Company: Inform the rental provider immediately about the loss. They will guide you on the next steps and may offer assistance in replacing the key or documents. 
• File a Police Report: Especially if official documents like the vehicle registration or insurance papers are lost, it’s advisable to file a First Information Report (FIR) at the nearest police station. This report can be crucial for processing replacements and for insurance purposes. 
Replacement Costs and Penalties:
• Lost Keys: Replacing a lost key can be costly, particularly for modern vehicles with electronic or transponder keys. Costs may include:
• Key Replacement Fee: Varies based on the vehicle model and key type.
• Service Charges: For locksmith services or towing if the vehicle is immobilized.
• Administrative Fees: Some companies may charge additional fees for processing the replacement. 
• Lost Documents: Misplacing rental documents like the agreement or insurance papers can lead to:
• Administrative Fees: For issuing duplicates.
• Legal Implications: Driving without necessary documents can result in fines if stopped by authorities.
Reporting and Resolution Timeframe:
• 24/7 Helpline: Many reputable rental companies offer round-the-clock customer support. For example, SIXT provides a 24-hour Roadside Assistance team to handle such emergencies. 
• Resolution Time: The time to resolve the issue depends on factors like the availability of replacement keys or documents and the location. Urban areas may offer quicker solutions, while remote locations might experience delays.
Recommendations:
• Preventive Measures:
• Secure Storage: Always keep keys and documents in a safe place to minimize the risk of loss.
• Spare Key: Inquire if the rental company provides a spare key and how it can be accessed if needed.
• Understand the Rental Agreement: Before renting, review the terms regarding lost items to be aware of potential charges and procedures.
By promptly reporting the loss and following the rental company’s guidelines, you can mitigate the inconvenience and continue your journey with minimal disruption.