i have lived/traveled to thailand for 17yrs. spending some time in PI new (just some).
most of the "savvy" visa services are in pattaya hence the number of old farangs there. of course, some elsewhere phuket, hua hin.
this is in pattaya. i assume they can do visa stuff internet only. good crew typical pretty (competent) thai girls in office and western owner.
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for me i got my visa in 2015 and used my US pension letter (county pension) needed few other documents. my understanding is that pension letters are really not accepted anymore only to get/fund a thai bank account.