The "People Love Us on Yelp" window clings are sent in an automated direct mail batch twice a year to businesses that qualify for this program. We don't issue (or re-issue) these window clings upon request, but if your business qualifies next time around you can be sure you'll be receiving one.
For another way to engage customers with your Yelp page, you can request a "Find Us on Yelp" sticker. You can learn more about our guidelines for using Yelp's logos, reviews, and star ratings.