I am getting married soon
We are preparing the documents and as expected, we are totally confused.
First Issue:
If we register in Singapore :
ROM Singapore told us just passport and IC will do.
If we register in Thailand,
Thai embassy ask me to check with Singapore embassy bangkok since i am Singaporean

Singapore embassy gave me a list of documents, MOM Letter (to confirm she never work in Singapore), CID Letter (to confirm I am not criminal??) etc.. to produce and to go Singapore embassy for affidavit (both my wife and myself) , then we can proceed to register in Thailand.

Sounds very weird since its Thai jurisdiction. (but whatever) .Even ask me to get my own criminal record from CID Singapore (I understand it i need to get one from Thai police since i am registering there but Singapore???) and go bangkok and show them
So out of the 2, obviously we decided to ROM in Singapore. But based on the 2 totally scenarios, I was thinking if ROM would last minute ask me to produce this or that as well, any experience??
Second issue:
My wife will be staying with me and I intend to apply long term visit pass for her, what are the documents I have to ask my wife to bring for long term visit pass? I checked ICA website and it says all documents in application, I am just worried we leave the original in Thailand and then we would have problem, so double check

My guess :
passport, IC, education certificates, ROM Cert.
Do they want household papers? birth cert or any other documents? (Really dun want to end up running back to thailand just to get another paper) From experiences, do we need these documents? Anyway, my wife says birth cert is given back when they get IC...not sure if she blur or true though.
From experiences, any documents or letters that our Thai wife need to produce for long term? if we apply for PR subsequently, any new documents we need to have??
And where do we get them translated into English? Thai embassy Singapore??
Thank you for your kind advises in advance