National Insurance Company — Problem with online renewal of two wheeler

Address:

Bangalore, Karnataka, 560016

I downloaded your NIC insurance renewal app and I opened the app. In that format first I have to enter 20 digits policy number but in my policy 18 digits are there. So I couldn't renew my policy. In this case suggest me how to solve this problem
my policy number is[protected]. office code is 604800. Date of policy is 29/02/2016. I request you to consider my complaint and do the needful