At the end of the form produced by the Constant Contact WP Plugin, there is a typo. The period(.) has been omitted. That paragraph reads: "By submitting this form, you are consenting to receive marketing emails from: [Company Name, Address, URL]. You can revoke your consent to receive emails at any time by using the SafeUnsubscribe® link, found at the bottom of every email. Emails are serviced by Constant Contact"
There is no mechanism to edit this statement in either the WP Plugin or in the Constant Contact web console.