A creditor shall not request cancellation of a policy of property or liability insurance except after the debtor’s default or in accordance with a written authorization by the debtor, and in either case the cancellation does not take effect until written notice is delivered to the debtor or mailed to him at his address as stated by him. The notice shall state that the policy may be cancelled on a date not less than ten days after the notice is delivered, or, if the notice is mailed, not less than thirteen days after it is mailed.