I've not heard of anyone being declined a bank account here in hua Hin who have a valid non-o, a residency certificate and copies of their passport pages ... Don't know where you're located, but Bangkok bank here is quite accommodating. I'm told (but don't know from experience) that immigration will issue a letter to the bank if you request it at the time of obtaining your residency certificate. What type of visa are you on?
because of the financial requirements of those visas and because Thailand wants their residents to keep their money in ฿.
Things have gotten tighter to clamp down in money laundering. Bank accounts that sit idle for looking periods are ripe for identity their and fraud because no one is looking at them.
Should be no problem. You will need a residency certificate from immigration specifically for opening a bank account. Bring copies of your passport pages, dress like you6r on business and your won't have any problem.
it takes one day! Go to immigration in the morning for a residence certificate, have copies of your passport info and you're in and out of the bank within the hour.