So, you did not have to provide any documents re your accommodation in Thailand ? (I was expecting to have to provide something like a rent/lease agreement)

It is infamous (as in a bit of a pain in the arse, and a bit silly buy typical Thai bureaucracy in action) but pretty straightforward process. It will not have been on your visa documentation as it is not vis specific - it applies to any foreigner staying in Thailand for 90 day or more and has to be done at least every 90 days you are there. You have to go to an IO (Immigration Office) with your passport and some evidence of where you are staying (rent agreement etc - but IO's can vary a little in what docs they actually require so worth visiting to get their specific reqs ahead). You will then get a little slip of paper that they staple to you passport, and you keep that there until your next 90 days. After you have done your first one, you can do later ones online. There is another process called TM30 which is where your residence is reported to Immigration upon your arrival (has to be done within 24 hrs - at least in theory). This is supposed to be a landlord's responsibility, but whilst hotels and large resorts almost always do it, smaller resorts, individual lettings and AirBnB places generally do not, and I am afraid, as unfair as it sounds some of them simply won't do it and you have to do it instead as all the IO's will refuse to do any process for you unless you have an up to date TM30. I am happy to help advise you on any of this if you want any more info or guidance - just DM me.

@Solenne *******************

Some guy left a very good explanation of the whole visa application process at Jakarta embassy on Google maps - including times for applications and times for visa passport/visa collection, and other tips. just click on the embassy and you will see it - I found it very very useful