@Jonah ***********

, well, you don't send original passport for 90-day report by postal mail. Check your local office what you should send for 90-day report.

For example, in Bangkok, you send all copies other than last 90-days report <- if you did the last one in person or by postal mail you send original receipt.

@Xavi ****

, you can as long as you meet the requirements at the embassy/consulate you apply for your visa at.

@Andrew ******

, are you aware OP is in Udon Thani? Ranong border is unlikely convenient for him.

@Joe *****

, consulate in Savannakhet requires appointment and processing time is +2 days.

@John *********

, later part depends on the hotel/guest house. Many check every guest’s ID, not only main person.

It's immigration office-specific if they require you to submit TM30 again after domestic travel. Some offices don't require you to update TM30 after domestic travel. You need to check with your local office.

But if you want to use the online system for a 90-day report, better to submit TM30 again after any travel regardless of your local office policy. 90-day report system checks your address with your latest TM30 record.

@Somjib ********

, no you need 2 months statement as before. But please make your own post for further detail.

@Robert ********

if you travel with a stay at a legit hotel/guest house, you have to update your TM30 record so that you can do the next 90 days report correctly.

Technically or logically, many immigration offices don't require you to update TM30 after domestic travel, still, you better do it as the systems check the address anyway.

No. 90 days report is to report that you are staying in THAILAND continuously for 90 days, not at the exact same address.

You have to do a 90-day report every 90 days as long as you are in Thailand, not leaving Thailand, regardless of address, such as hotel, or guest house.

@Raphie ***

wouldn't be an issue, as I said, the extra one is a "check bit", not a part of actual passport number