Do I need to file a TM30 when returning to my condo in Pattaya after one night in Bangkok?

You could ask the hotel if they will file one, explain to them it’s only be night and you will need to file one on returning home if they file one

However for one nights stay it’s not required

At worst if your concerned about a fine, just file one anyway when you return

I’ve stayed in hotels where they have asked me if I will inform immigration, because if I will they will if I’m not then they won’t either

When entering with a new passport and your old passport has your 2 year visa and re-entry stamp,will the Immigration officer transfer the stamps to you new passport or do you have to go to Jiomtem Immigration.Thankyou

NO

Nooooo

Do you need to use Immigration for an extension or something when you return? If not don't worry.

I've never bothered 🤔

It is always the owner of the house, who is responsibel for making the TM30, not the visitor.

Don't bother

No. Its only one night

Are you staying at a hotel in Bangkok? If so they'll probably file a TM30 for you so you'll need to file another one when you return.