Can your home insurance company cancel your insurance without notice?

This vary from state to state. For the most part, the only time an insurance company actually 'cancel' your policy, there has to be a very valid reason..for example, the insured withholding information or committing fraud. Otherwise, most companies take a less severe method by non-renewing. Doing this, they provide the consumer with an advance notice to not renew the policy. The consumer is provided with ample time to secure coverage elsewhere.