Did I Complete Activation Correctly?

Don't worry about it. Despite AARP's misleading verbiage, no registration or activation is required for its member card, as long as you've paid the membership fee. You can verify this by phoning AARP at the number on the back of the card. Filling out the form is helpful to AARP but not to you; it's essentially a way for AARP to profit from its partner companies that want to know about your susceptibility to its solicitations. (We're an independent help site not connected with AARP.)

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Hope this is useful. Please don't forget to click the Accept This Answer button if you do accept it. My aim is to provide reliable helpful answers, not just a lot of them. See https://www.helpowl.com/profile/Odin.