A statutory declaration of change of name is a document that can be used if you would like official organisations (eg. your bank, building society, the passport office etc) to recognise your new name. It can be used to change any part of your name (first name, surname, middle names etc). It provides written evidence that you have decided to change your name and would like your records changed to reflect your new choice of name.
Make sure you follow proper legal procedure when you want to officially change your given name, surname or both with this statutory declaration of name change.