Re: does this Nullify Nikah?
Uncle Mufti, nikah (as we know it) is Sunnah, not Fard. What is fard is the announcement of your intention to marry this person in front of society, and adult and mature people of that society to know that you two have done eejab o qubool without any pressure, and have taken each other as husband and wife. That is what Civil marriage is. Whoever is forcing a condition of 'typical Nikah' as practiced in indo pak on people, is simply encouraging adultery amongst Muslims who are living in non Muslim societies. Just because you live in GTA where there are 2 dozen mosques, does not mean that every Muslim living in west has that luxury.
What is a 'typical nikah'? I don't think this is a discussion about what a nikah is culturally.
Also lets not confuse nikah with getting married. Getting married is sunnah. By which we mean, it is not a requirement for every muslim to get married. There are some conditions under which it can become wajib for a person, but that is a whole other discussion. If you do want to fulfill that sunnah, nikah is the way to do it. Like @Mirch and yourself pointed out, nikah means a proposal, acceptance with 3 adult muslims as witnesses. And all three aspects are fard for nikah; missing any one of them makes it invalid. Now am not sure if court marriages satisfy those 3 conditions. If it is in a place in the west where there is no masjid, then what are the chances of finding a 3 adult muslim witnesses? Guess you can fly them in or something. Or just fly out to GTA to get married. Honeymoon in Niagara Falls....I digress...