No, it's not mentioned on the RTE Paris, I have read this already I don't remember on which forum but looks like a wrong information if I read well your comment.
Thank you for the answer. So, let's say my visa is approved today, can I have my flight to Bangkok for example next October? I thought I had 30 days or 3 months before having to validate it at airport immigration. I'm not sure to be very clear. Thank you 🙂