Not to be a nervous nellie, but if they want you to officially cancel - do it.
Wny, you never know what comes back to bite you. I moved to TX and let my OR drivers license lapse as I got a TX one. A few years later, I get a notice that my car insurance is canceled as I have NO license. The OR folks turned me in for not renewing!
It was exciting to get my insurance back, I had to go up through the hierarchy of the company to get someone who would listen.
Anyway, it's fun on a gun list to say this or that. But if you don't have to start a potential problem, don't.