Your wording is wrong.

„I arrived in Thailand on a non o 90:dy visa from uk with intention of getting a retirement visa”

It actually is totally different:

*** you arrived in Thailand on a 90-days Non-Imm-O “retirement visa” and got stamped in for a 90-days stay permit

The visa itself becomes invalid upon entry

***you have the intention of getting a “1-year extension of the stay permit” based on retirement.

on a 90-days Non-Imm-O family visa, you can fly one-way. You don't need an onward-travel proof. If the Check-in does not comply, ask for the manager and explain to them that this visa is the first step for a longstay in Thailand

@Mike *******

must add: "I think they will also accept an income proof of minimum 40,000 THB monthly, but you will need an income affidavit from your embassy. Not every embassy is issuing the affidavit."

should be like this, but it can be a bit different from one Immigration to the other. Best is you visit them and ask for the handout list of requirements

@Patty ******

in the first two years you can squeeze from a Non-Imm-O/A visa, Immigration will accept an overseas insurance (as long as they sign the F.I.C.). However when you move from the visa to the "12-months Extension of Stay Permit" beginning from the third year, Immigration only accepts a tgia-listed Thai private health insurance

never go into an overstay knowingly! Avoid it !

change your home branch. Get your TM30, visit Immigration and ask them for the certificate of residency. Then visit the bank branch and ask them to update your address and phone number. Done

@Bob *********

he is 19

yes, every U.S. Dollar has double the purchase power in Thailand. You pay less than half for rentals, local food, electricity, water, carwash and restaurants, just to name a few.

@Anna ********

that's what I said