Because insurance plans are contracts, they must be cancelled in writing. You must write a letter giving your insurer formal notice of cancellation in order to cancel the contract.
Putting your cancellation request in writing protects your interests by giving hard copy proof of your request.
As a starting point for your own home insurance cancellation letter, use the template given here.
Home Insurance Cancellation Letter Sample
Attn: Cancellations Department
[Insurance Company Name]
[Insurance Company Address]
Re: Cancellation of [Home Insurance Policy #]:
To Whom It May Concern:
I regret to inform you that I, [Name of policyholder along with home insurance policy] have decided to terminate my home insurance coverage effective immediately.
The reason for my decision is based on finding a more comprehensive coverage for a lower cost. Please, send me a written confirmation of the cancellation for my records at your earliest convenience.
[Name of policyholder]