Or take Sam's Club online. You get your ID number immediately, can enter it, and it works. I'm especially sensitive to the email issue. You see, I manage virtual teams. I also teach online.
Timely responses are critical.
Now I know I'm not getting thousands of requests, but a little common sense goes a long way. If you can't or don't want to respond in Internet time, don't include a link. She frequently clicks the back button when sites take too long to load. She promptly deletes junk email, but just as promptly answers inquiries and questions.