Oh, and the person who signs that its you can't live at the same address or be related to you. And the post officials can no longer witness you signing.
Oh! And the best thing is that, once filed, you are given a passport application number. You can then log on to the website, enter the number and then the name of the passport holder, and several other details (like the full name of the person who signed your photos) and then you are given a new pen. With the application # and pen, you can follow the progress of the passport! Nice.