Some questions about marriage, visas and JFRV

Yeah I can understand the confusion. The ones I’ve been handling all do not need any additional paperwork or authentications so long as the paperwork is from the Taiwan side. Since you got married in Taiwan, then all Taiwan documents are sufficient without any need to reauthenticate to its genuineness. Introducing another marriage cert into the equation is unnecessarily complicating things. TW bureaucrats don’t like complications, just give them their documents, no more, no less, don’t offer anything else that would get them to start questioning.