I will need to transfer funds to one account to show for the 500 Thb but I will need to send it back to my other accounts the following day. Would I be able to do this if I get the statement showing 500thb on the day it was deposited or does the money need to stay in my account for a certain amount of time. Also, what is the best document to show for the funds? Is a downloaded pdf of my Bank statement?
TLDR : Answer Summary
You can transfer the funds back to your other accounts after showing the deposit for 500 THB, but it is advisable to retain the amount for a certain period, as requirements may vary depending on the embassy or consulate. A proper bank statement that includes your name and address is necessary—while some places may accept only one month of statements, others might require 3-6 months. A simple PDF of an incoming wire may not be sufficient.