We often see remittance addresses changing in our industry and on a less frequent basis, we see the policy #'s changing which is usually due to system conversion at the company. You should review your policy each time it renews or any time you make a change to the policy as the price will change and you will need to adjust your payment amounts on your on-line banking account.
The easiest way to avoid a late payment for any of the reasons above is to sign up for Electronic Funds Transfer so that your payments are just withdrawn automatically. This way, you usually avoid installment fees and your payments are spread over a longer period of time, thereby reducing the monthly installment amounts.
Learn more about personal insurance here.