What is the best way to prove the 500k THB requirement for a Thai visa when using funds from a family account?

Hello,

I have a few questions regarding the bank statement to prove the 500k THB, although I scrolled the group posts by searching, I couldn't find something similar to my situation (apologized if my questions were actually already answered):

1. I'm a French citizen, with Permanent Residency in Taiwan. I have worked in Taiwan for 6 years, so I can show my salary slip until June 2024.

2. I recently started a new job. It's a consultant contract, with a Singaporean company, starting from July 2024 to December 2024. Same here I can show my contract and my invoices for July+August payment.

3. The thing is, I made few big operations with my Taiwanese bank account so currently my Taiwanese account doesn't have 500k THB.

4. However, in France we have a family shared account, (I have the power of attorney for this account but it's not under my name, my parents'), where we do have more than 500k THB.

Questions:

1. Would you advise to transfer money from the family account to my own personal account? Or a statement proving that I have the power of attorney would be enough?

2. If I do need to transfer on an account under my name: Is transferring to my French bank account would do, or is it better to transfer directly to my Taiwanese account, which I used daily for the past 6 years (I received all my salary on this account)?

3. I understand that each embassy/office have different rules regarding the period we have those 500k THB in the account.

Let's say I do the necessary transfers next week, would you recommend Taipei or Vientiane? I have family in both cities so its convenient for me to stay there few days, hence those two options..

Thank you in advance for your answers!