Driving a car on the road requires a valid car insurance policy but more than that, it has to carry all the correct details of the car. At times, there could be certain changes that need to be incorporated into the policy document. Such changes are reflected as endorsements in the policy document.
Endorsement is an amendment to the insurance contract  which changes the existing terms and conditions of the original policy to  imbibe the new terms and conditions in the insurance contract. An endorsement  may add or delete the coverage under the car insurance contract. Whenever an  endorsement is done, the insurance company issues an endorsement copy as proof of endorsement to the insured. The endorsement copy has to be read in  line with the original policy copy. The endorsement policy copy is considered  as the final agreement in addition to the original policy copy; the endorsement  wordings overrule the wordings in the original policy copy at the time of  claim.
 For example if  the original policy copy is issued without Bumper to bumper add-on/rider but  the insured had taken a midterm addition which is endorsed in the endorsement  copy, in case of any claim the claim amount will  be   settled on the bumper to bumper basis as the endorsement is done for the  same. Bumper to bumper car insurance covers the depreciation costs associated with the part at the time of claim. Endorsement in car insurance can be Financial or Non financial; financial  endorsement involves the payment of addition premium while the non financial  endorsement doesn’t require any extra premium payment. 
What is Endorsement in Insurance?
Endorsement in insurance related to changing the details mentioned in the policyholder’s policy document. If you are wondering what the simple meaning of endorsement is, then it can be understood as making few modifications in the existing policy.
Endorsement in a car insurance policy is mostly admitted by the customer. It involves making changes in the car’s insurance policy. Depending upon the insurance company’s process, they might cancel the existing policy and issue a new policy with the necessary modifications and mention that it has been approved. Thus, an endorsement can be viewed as an agreement between the policyholder and the insurance company regarding the additional changes in the insurance policy.
Endorsements can be divided into two types are Basic and Advanced. Basic endorsements can be changes in the name or address, while advanced changes are usually related to amendments and additions in the Comprehensive car insurance policy that have a direct impact on the scope of the policy.
How does it Work?
After a week since policy issuance, you want to opt for a Voluntary Deductible. You raise an endorsement request for the same. The insurance company makes the necessary changes and sends across an endorsed policy document. This change will last until the policy is terminated, expired, or further modified.
Endorsements usually happen just after the policy is purchased. They can be done during the policy period or before renewal as well. The validity of the endorsement should last until the policy expires; however, the exact details might vary depending upon the type of endorsement and the insurance company’s terms and conditions.
  -  A change/correction in the engine number
-  A change/correction in the chassis number
-  A change/correction in the Registration Number
-  A change/correction in your name
-  A change/correction in your address
-  A change/correction in your mobile number and/or your email id
-  An inclusion of a CNG/LPG Kit 
-  Including or increasing the voluntary deductible
-  A change/correction in passengers covered or the seating capacity of your vehicle
-  A change/correction in your car's variant
-  A change/correction in your car's cubic capacity
-  A change/correction in the make and model of the car
-  Any correction in the No Claim Bonus
-  Any premium mismatch
-  Change in the details of the nominee
-  A change/correction in your vehicle's fuel type
-  A change/correction in the vehicle's year of manufacturing
-  A change/correction in the Insured Declared Value (IDV) of your vehicle
-  A transfer of ownership
-  Any addition or deletion of electrical accessories.
Types of Endorsement
1.Financial:
Any Endorsement which requires additional premium to be paid  is known as the financial endorsement in the car insurance. Let us understand  the types of financial endorsements provided under your car insurance policy.
Rider/Add-on inclusion: 
Add-ons or Riders, as the name suggests indicate the extra  coverage to your car insurance policy in addition to the coverage offered by  the regular comprehensive car insurance policies.
Midterm addition of riders in the policy copy is permitted by  the insurance companies only after satisfactory pre inspection report. For  instance if the customer has not taken or missed out taking bumper to bumper  rider in his comprehensive car insurance policy at the time of renewal, he can  request the insurance company to pass an endorsement adding the bumper to  bumper add-on. The premium for addition of rider or add-on has to be paid by  the insured and the risk start date is taken as the date of premium received by  the insurance company and not the original policy start date.
Name Transfer/ Ownership transfer:
Name transfer or ownership transfer is the common type of  endorsement in car insurance where the ownership is transferred from one  customer to the other due to the sale of the car. Since the car insurance  policy contains No claim bonus which is offered to the owner/driver and not the  car, the NCB amount (if any) has to be paid to the insurance company and a  nominal fee for name change had to be paid post which the endorsement will be  passed by the insurance company.
No Claim Bonus is the discount offered on the Own damage  section of your car for your driving behaviour. Less the number of claims, high  would be the NCB over a period of years.  
For example, Mr.X has a car with 20% NCB and has sold it to  Mr. Y. Now Mr. Y has to get the name change done in the policy copy as he is  the rightful owner of the car and any damage or loss to the car affects him  directly. For the name change to take place, a nominal fee has to be paid to  the insurance company. After the payment, the insurance company passes an  endorsement with the owner name as Mr. Y.
Removal of Anti Theft Device & AAI Membership:
Anti theft devices are those which are fitted in the car and lock  the steering or ignition of the car thereby preventing them inaccessible for  the thieves and others without a key. Having an approved anti theft device can reduce  the premium in your car insurance policy. In case of addition or deletion of  the anti theft device during the policy term, the same changes can be made in  your car insurance policy with an endorsement. If the anti theft device is  added, then the premium is refunded to the customer and in case the anti theft  device is removed, premium is charged from the customer.
Members of the Automobile Association of India are eligible  for discount under the car insurance. Automobile Association of India is an  association which is formed in India and has branches in more than 150  countries to provide assistance to the riders. Apart from this service the  members of the association are also eligible to get Breakdown assistance,  Passport assistance, Driving permits and other miscellaneous services on paying  a nominal premium. The endorsement is required if you take up the membership of  Automotive Research Association of India (ARAI) or any other recognized  automobile association, or your existing membership expires or is revoked.
Inclusion of CNG/LPG kit:
Most of the cars in India support bi-fuel system; petrol/diesel  is the main fuel while the CNG/LPG is the secondary fuel. There are models  which support this but are not manufactured as bi-fuel, in which case customers  get the CNG/LPG kit fitted to their cars. If the CNG/LPG kit is fitted in the  car during the insurance policy period then there would be need for an  endorsement in your existing insurance policy.
This endorsement will be charged by the insurance company as  the addition of CNG/LPG kit increase the risk from the view point of the  insurance company. The endorsement is carried out only after the satisfactory  inspection report.
Addition/ deletion of Electrical/Non electrical accessories:
Electrical accessories are the extra fittings that are done  by the customer which are not there in the car fitted by the manufacturer.  These electrical or non electrical accessories include High-end stereo system,  LCD Screen etc. which are fitted by the customer as per his taste and  convenience. These extra fittings can also be insured by declaring a separate sum  insured/ IDV for them and paying extra premium. These fittings are to be  insured as there would be the risk of theft and fire damage.
In case these accessories are added, then you have to inform  the insurance company and get the endorsement done by paying additional premium  depending on the IDV/value declared for these accessories.
Non  financial 
Change in Engine & Chassis Number:
Engine and Chassis number are unique for each car and are  mentioned in the RC copy as well the insurance policy copy for identification  of the vehicle. In case of wrong entry of Engine and Chassis number in the  policy copy you can get it corrected from the insurance company by passing an  endorsement stating the correct engine and chassis number of your car.
Some insurance companies may ask for inspection report if the  Engine and Chassis number is to be changed altogether instead of minor changes.  This is done to prevent the fraud from happening at the time of claims. This  type of endorsement doesn’t require any premium to be paid and is carried out  by the insurance company on the request of the customer
Change in Registration number:
Any changes in the Registration number mentioned in the  policy copy can be carried out without paying extra premium to the insurance company.  The insurance company issues an endorsement mentioning the correct registration  number in the policy copy.
The registration number in the RC copy should be reflecting  in the insurance policy copy as well to prevent any issues at the time of claim  settlement.
Change in Name, Address & Contact details:
An endorsement can be carried out to make changes in the Name  of the insured, Address of the insured and other contact details in the  insurance policy copy if they are wrongly mentioned or if customer wants to  make changes as per his updated details.
It is important to get the address and contact details such  as mobile number and email updated to get the relevant notifications and  communications from the insurance company.
Change in Car variant, cc, make and model, fuel type:
An endorsement can be issued by the insurance company to make  changes in the variant of your car or make, model and fuel type if it is  wrongly mentioned in the insurance policy copy.
For instance you have a Maruti Ciaz Petrol car but by mistake  your agent had issued the insurance policy with the Make model as Hyundai Creta  Diesel, then this can be corrected by passing an endorsement by the insurance  company instead of cancelling and issuing a new policy with the correct details.
Change in nominee:
Correction in the nominee details can be availed from the  insurance company with an endorsement. If you want to add or delete the nominee  in your insurance policy, a declaration is to be submitted to the insurance  company to make the necessary changes as per your requirements.
The  main reason to issue endorsement by the insurance companies is to prevent the  issue of cancelling and reissuing new insurance policy copy every time a change  is to be made. Passing an endorsement is the easy thing that can be done by the  insurance company in a policy year instead of cancelling and re-issuing the  insurance policy with the correct details.
The best car insurance agent for car insurance near you can be found online at Car Insurance where we have a dedicated team of agents to assist you in selecting the best car insurance in accordance with your needs. 
How to Apply for Car Insurance Endorsements?
Making an endorsement or a change to your existing car insurance policy is easy. You can follow the steps given down below for a car insurance endorsement:
  -  Contact your insurance provider and give them details of the endorsements you wish to make to your existing policy.
-  Your insurer will require you to furnish proof for the changes you have made to your vehicle.
-  In case the changes are more to do with the policyholder, ownership of the vehicle or nominee details for the policy, then you might have to furnish proof of sale or other such relevant documents.
-  The insurance agency will verify the authenticity of the changes cited and will incorporate the changes to your policy post a detailed verification.
-  You will be issued an Endorsement Certificate citing the changes you have requested for your existing policy.
-  These days many insurance companies also have an option to make car insurance endorsements online.
Conclusion:
Now that you know why it is important to update your policy through endorsements, make sure you follow through. Ensure correct documents are filed at the time of requesting endorsements to your existing policy. This will help you and your insurer avoid making mistakes while updating your policy to reflect the newly-added endorsements.