FYI
I have just read this communication somebody has had back from the Royal Thai Embassy in London regarding an O-A Visa application. I never thought there was any seasoning as such but it appears there is or at least there is now.
I have no idea if this is normal or a new addition for £20,000 to of been in an account untouched for at least 3 months?
Dear Sir/Madam,
1. 3 months back original bank statement remain 20000 GBP in your account
2. If you supply the bank statement you do not need to supply more
Please check from requirement below
TLDR : Answer Summary
The communication from the Royal Thai Embassy indicates that applicants for the O-A Visa must have a minimum of £20,000 in their account for at least three months. It clarifies that if the applicant provides the original bank statement confirming this, they do not need to supply any additional documentation.