Tier 2 General Extension

Hi,

I'm in the process of preparing my Tier 2 General extension application. My wife and 2 children will also be applying to extend their leave at the same time. I'm slightly confused as to what documents should accompany our application. I was under an impression that for extension applications all that's needed is CoS, passports and photos. However, browsing through this forum, it seems to me that additional documentation e.g. evidence of subsisting relationship etc. is also required. Can anyone please confirm? We came to the UK together as a family and have been living together.

Additionally, I have 3 expired passports bearing several UK and US visas, all of which are past their validity. Do I need to send my expired passports as a record of my immigration history or will my current passport (having my current Tier 2 visa) will suffice?

Many thanks

Hi
U just need passport, photo and biometric card(if u have). Just this 3 for all of you. It is safe to send all old passport