[HonkyTonkyMan]

I think for null and void to be awarded, one important factor is that the couple never consummate the marriage or as the chinese put it "dong fan". But we all know that this is practically impossible as most couples would have done it long before the actual marriage. So normally they look at whether marriage has gone through the traditional solemnization. If I can recall many years back that TCS actor Wang Yu Qing got his marriage declared null and void to the gal becos they didn't go through traditional marriage.