Is it acceptable to submit TM30 after a weekend closure of the immigration office, and will there be any penalties?

I flew in on the 6th and dropped it off on the 10th and she stapled a confirmation in my passport and gave me a big smile and said "thank you". It's always the same woman....

I must have good timing too, last time I went there around 2 and was out in 15-20 minutes

Wow in Ubon you could show up and do the tm30 next month and they wouldn't care, way more laid back over here!

I did TM30 three times, and each time is a bit different.

My first time was two years ago. I was three months late. Not days, not weeks, but months with a capital "M." I was fined for an amount. Not a big one. I was late because I didn't know I have to do TM30.

The second time around, I was much better. Going there in required time. Right then, I was told that the landlord was not required to appear if address is the same.

The third time was a bit odd. I came back late October, before the King's funeral. My superior told me to wait, both because of the work I have to do to catchup and the funeral. I was almost a month late but was not fined.

My experience with Thai immigration has been wonderful. If I show willingness to comply, the officers are willing to help. Having a superior who has experience in public sector also help.

You'll be fine going the next day they're open because the immigration office was closed on the date you arrived.