Dear Maurizio,
Thank you very much for your understand.
For the revenue department of Thailand,This case WHT will pay to revenue department winthin 7 days of next month.
So, When we pay to you we will keep it and will follow the steps of revenue dedartment in Thailand. The all document for revenue department send to you after next month.
I hope you are undersatand for precess of Thailand.
Thank you very much.