Fuel, insurance, and add-on disputes can become messy because several charges appear on one invoice. Isolate the exact line item, then ask for the document that proves that line item was agreed or correctly applied.
Fuel and refueling fees
Ask for the fuel policy that applied to your booking, the pickup and return fuel reading, timestamped return record, refueling receipt, and calculation of the fee.
Insurance and add-ons
Ask for the signed rental agreement, add-on disclosure, itemized invoice, and explanation of whether the charge was optional or required. If you booked through a broker, keep the broker terms too.
Downgrade or refund issue
Keep the booking class, supplied vehicle details, photos, final invoice, and any branch messages. Ask the company to explain the difference between the reserved class and supplied class.
What the tailored request should cover
- Fuel: pickup fuel level, return fuel level, refueling receipt, policy, and fee calculation.
- Insurance or add-ons: signed agreement, disclosure screen or paper, optional/required status, and itemized invoice.
- Downgrade or refund: booked class, supplied class, branch notes, invoice correction, and promised refund.
- All cases: rental reference, exact line item, amount, date charged, and the outcome you are asking for.
What not to mix together
Do not combine a fuel complaint, insurance complaint, and damage complaint into one emotional paragraph. Put each disputed line item on its own facts-and-evidence track so the company cannot answer one point and ignore the rest.