Shop and save on our top 20 best selling checkbook covers. At Checks In The Mail, you are sure to find something you love. Accessorize with your favorite movies and characters, cute designs, or favorite charities. Order personal checkbook covers to keep your checkbook safe and secure, but also fits your unique personality! Match your checkbook cover to your personal checks or return address labels and save big on all of our personal products. Shop online and save, today.