3年前我在广东打工时与贺州小伙刘某相识相爱,刘某父母知道后催促我们尽快结婚。可我们不能立刻回家,他家便让我们寄回照片,由刘某的姐姐、姐夫代替我和刘某在贺州办理了结婚登记手续。后来,我和刘某因生活琐事经常闹矛盾,以至感情破裂,刘某要我留下小孩离开他家,并说我们的婚姻属于无效婚姻,我不能分割家庭财产。我后悔莫及。请问,家人代办的结婚证是否有效? 3 years ago when I was working in Guangdong, I got acquainted with my friend Liu of Hezhou. After my parents knew, they urged us to get married as soon as possible. But we can not go home immediately, his home will let us send back photos, by Liu’s sister, brother-in-law to replace me and Liu in Hezhou for marriage registration. Later, Liu and I often make contradictions due to the trivialities of life, and even my feelings burst. Liu asked me to leave the children to leave his home and say that our marriage is an invalid marriage and I can not separate my family’s property. I am sorry. Excuse me, the family agent’s marriage certificate is valid?