That issue arose with me in November 2023 when I wanted to pay a hospital 170k, prior to my op. My bank said no, you can't pay a bill of that size because it exceeds the authorised limit.....despite the fact I had 500k in the account. The call center agreed to increase my daily limit to 170k, for one day only, after which it would revert to 50k. Ultimately I decided to pay using my UOB CC which has a 500k limit and there was no problem. The first bank mentioned was Bangkok.