Thank you for contacting NRIOL for your travel insurance requirements. If your travel dates are not yet confirmed but you need to purchase insurance immediately for applying for the visa, then you can buy the insurance using the tentative travel dates. However once your travel dates are confirmed and if there is a change in travel dates, we can do the needful and change the insurance coverage dates, provided the changes are made before the start of the insurance coverage period. It the total coverage duration is reduced, then you will get a refund from the excess premium after deducting the policy premium and the cancellation charge. If there is a increase in the total duration of travel then you have to pay the additional premium for the additional days of insurance cover.
You can get free quotes and buy the policy online at Bajaj Allianz Travel Insurance