Haw. Rev. Stat. § 481R-10: Cancellation of warranty.

(a) Each vehicle protection product warranty shall state the terms, restrictions, or conditions if any, governing cancellation of the warranty by the warrantor before the expiration date of the warranty. Cancellation may only occur under this section for:

(1) Nonpayment by the consumer for the vehicle protection product;

(2) A material misrepresentation by the consumer to the seller or warrantor;

(3) Fraud by the consumer; or

(4) A substantial breach of duties by the consumer relating to the warranty.

(b) A warrantor shall mail written notice of cancellation to the consumer at the last address of the consumer contained in the records of the warrantor at least thirty days prior to the effective date of the cancellation. The notice shall state the effective date of the cancellation and the reason for the cancellation.