Pre-paid special delivery and proof of address necessary?

[tier1extension]

First question: I am planning to move to a different address in the near future after the date of my application using the Nationality Checking Service. Therefore, I am planning to use my future address in the application form that I will be submitting. Will they ask for proof of address? This is because my driving license, bank statements, etc will still have my old address because I haven't yet moved to the new address.

Second question: if I apply using the Nationality Checking Service, do I have to buy a special delivery pre-paid envelope? Is it advisable to get it?

[geriatrix]

Please continue in the existing topic.