Offer your insights or judgment on the input financial query or topic using your financial expertise. Reply as normal question answering

Auto Insurance: Adding another car to the existing policy (GEICO)
tl;dr: Call them. I'd be very surprised if you have a problem. I used to have have a policy with Geico, and would pay for my car insurance 6 months at a time. About 2 months into my last period, I purchased a house. Unfortunately, Geico didn't offer homeowners insurance in my state, so I ended switching to another company that offered a better auto+home combined policy.  Since I had already paid for 6 months of coverage, I figured I'd just be stuck being double-covered for 4 months. So, I didn't bother doing anything until the end of the 6 months and called them to cancel the auto-renewal thinking what I've already paid was a sunk cost. The asked me why I was canceling and I explained the situation and they backdated the cancellation to when I got my policy with the other company and Geico issued me a refund for the time there was overlap.  Considering that they did that for a leaving customer, I'd expect them to be able to cancel the policy on a new car of a current paying customer with no issues.