Do I need a TM30 from my landlord for a 30-day extension on a 45-day visa exempt entry in Chiang Mai?

This may seem fairly basic and I know there’s been a lot of posts but despite searching I still don’t see a clear answer.

So, 30 day extension on a 45 day visa exempt entry in Chiang Mai:

Do I or do I not need to get a tm30 from my landlord? Is there not a fixed answer for this?

There’s no departure card so I think that, tm30 aside, what I would need is:

photocopies of passport (entry stamp + main page), 1 photo, 1900B and form filled in on arrival at immigration office?

Tia