1. Non-payment of premium;
2. Material misrepresentation/Fraud;
3. Conviction of a crime arising out of acts increasing the hazard insured against. (For example, conviction for illegal storage of fireworks);
4. Discovery of willful or reckless acts or omissions by the insured increasing the hazard insured against. (For example, not getting a gas leak fixed);
5. Physical changes in the property insured which result in the property becoming uninsurable. (For example, should the home become vacant for more that 60 consecutive days, there is automatically assumed to be a greater exposure to vandalism and damage); and
6. A determination by the Commissioner of Insurance that continuation of the policy would place the insurance company in violation of the law.

Source: Massachusetts Department of Insurance