If you need to change the start date of your insurance, all you need to do is cancel your current policy and repurchase with the new start date.
Steps to cancel and repurchase:
Log into your Duuo account and select 'Cancel Coverage' for the date in which you would like to cancel. (Select the last day you need coverage.)
You can then proceed to purchase a new policy as normal by selecting 'Add Address' in the top right-hand corner of your dashboard screen.
Please note that when you cancel a policy, Duuo will automatically issue a refund, but it can take 5-10 business days to show up in your account depending on your financial institution.