I received an email from "Shaw Inc." stating that they could not process my last payment, and to re-submit my payment information.
A call to Shaw's Customer Service, which provides telephone, cable and internet access found that they notify customers only by letter, and that the email was an attempt to get my account information.

Beware of any attempts to get account information. Always verify by contacting the service provider by 'phone or letter mail to check status of your account.