For number one, we are staying in an apartment owned by my wife's mother. The mother doesn't live with us, but it's owned by her. Because of this, we haven't been under a rental agreement.
For the third, I think we can do this, but I'm not entirely sure...
Do I need to show an extended period of time for this (several months in the past) or just that we are currently living together? Does anyone even know if this would qualify under the 3rd one? It's a government paperwork that will have an official stamp, so I assume it should be sufficient.
Also, do the two pieces of ID need to be the same, or can they be two different pieces? For example I show registration, she shows a passport.