The purpose behind a statutory declaration and a deed poll are the same. However, statutory declaration is less know and much more difficult to obtain. Statutory declaration has a complicated process where the person needs to take an oath in front of the commissioner of oats or justice of the peace. All this gets very complicated and expensive as compared to deed poll. With Uk deed poll service, there is no need for you to go to any office, everything can be done with simply contributing a few minutes online.