Return to Invoice is an add-on option which covers the gap between the insured declared value and the invoice value of your car along with the registration and other applicable taxes. 7 days ago · Return to Invoice Cover in Car Insurance - Know more about RTI Insurance, what. All about return to invoice cover (RTI) in car insurance. Protect your vehicle with return to invoice (RTI) car insurance add-on cover that provides you with the full value of vehicle if its totally damaged. Car insurance (also known as auto or motor insurance) is bought to protect your. Compare & Buy Car, Bike and Health Insurance Online.