One question would be on the TM30 side, on how old is it? It has to be currently active, that is 'on the new system' (so probably less than 12 months old), and the 'checkout date' mustn't be in the past. (blank is best to prevent expiry).

When i apply yearly for my extension of stay, for which I have a multi-re entry permit, the re entry permit becomes void from the day i submit the application, although it has amonth still to run. If i want to leave the country while my paperwork is considered i have to purchase another Single re entry permit to cover the under consderation period. Then when the extension is approved a new Multi re entry permit with the same dates as the new extension. This obviously leads to overlapping dates on the permits, but only the most recent is recognised.

I'm not sure of the dates, but it has to be getting on for a year since IMM introduced the new TM30 system. Its the new system thats linked, not the old one, and i suspect they have now shut down the old one and not accesable to IMM online process. So you have to have a TM30 on the new system, passport no, address and name have to be same on both sytems, and on the TM30 the 'leaving date' needs to left blank so it doesnt expire and you keep a copy of the pdf so you can use it to fill in the tm47 next time.

@David ********

maybe i should have said some countries rather than most. It would also depend on circumstances, for a renewal where you have both the old and new passports and not issued via Embassy, i received no letter and wasn't required to produce one at CW when i moved my stamps last time. So if the OP has one then he should produce it when he goes for the swap, but if he wasnt issued with one its probably a waste of time worrying about it.

@David ********

most countries no longer issue a letter for renewal passports.

@Bart *************

when you have the stamp moved, you also get a stamp detailing the original visa type, so you can just file the old passport and carry the new one.

@Ajarn ********

the auto gates are only available for exit, you still need to go through the normal process for Entry and will receive a stamp.

@To**

the only people who dont know, are those who haven't taken the time to visit the relevant government Tax web sites and understand the changes implemented last October and revised in November. Everything has been published already. The impact will depend on your home country and any DTA's that are in place (which are different by country). Most people will carry on as now and not be impacted as they have never put themselves into the Thai tax system, this doesnt mean there is no tax lability, just the taxman hasnt got round to checking your obligation on monies remited to Thailand (and hopefully never will). But if you have payed more tax in your home country than would be due in Thailand on the money remitted and/or there is a DTA in place covering the source income there should be no change.

@Geoff *****

yes, i stand corrected, i thought i read late April. You will have 90 days from when you return to get the stamps moved.

Dont know why its there, but pretty sure you can leave it blank. Also in the stay To field should be left blank if you havent got a defined stay, (hotels use it for booked nights). The TM30 will expire on that date.