My surname and my parents surname on my passport are different.?
The question is not if your and your respected fathers surnames are different - This is within the realm of a reality. After all, you have a first name and a second (middle), possibly next to that a Last name. And so does your respected father. The question is to establish you as your respected fathers blood or adapted son. To do this, correlation between your name and your RESPECTED FATHERS NAME is ONLY RELEVANT TO the extent that his name as given in your produced documents should tally. For example, in my class 10th documents mine, Rajinder (First name) Singh (Surname / Last name), fathers name is given hypothetically entered as Ashish (First Name) Braveheart (middle name) Soldier (Surname / Last name). As you can see, there is no correlation between my fathers given name and my name. But what is important is that in all my documents, my fathers Name must appear consistently as Ashish (First Name) Braveheart (middle name) Soldier (Surname / Last name). I hope you got the point.