Special Delivery is an option available for Royal Mail business accounts. With the UK mail delivery tracker, the package is tracked from start to finish. Apart from this, senders can rest assured that there is a signature on delivery along with email or SMS verification. Apart from this, next-day delivery is guaranteed by the next working day, coming with a money-back guarantee when not completed. Use this option for extra-special and vital packages that you want to keep a close eye on.