I should also add that this be a good reference for people who are contemplating marriage in Taiwan. Taiwanese customs and laws w/r/t marriage are really old-fashioned and conservative toward the sanctity of the “marriage”. So any notions that Western practices (e.g. paperwork and other such documentary proof) should apply are not applicable here.
In my case, if there were to be a problem for me to register my wife here (we were married under the laws of Malaysia), all I need to do is have a little dinner with 2 witnesses (e.g. me, my wife and two witnesses) and that would be sufficient to be “married” under Taiwanese law and customs. Then register her through the Taiwan marriage, not, the Malaysia marriage.
IOW, couples with cold feet or problems etc, if you think you can “back out” by not signing the paperwork or going through the ceremony, better think “don’t eat the food” – no banquets. The banquet is for all intents and purposes the “wedding ceremony” in Taiwan.