Does anyone know how to do this? the passport renewal form tells me i need to pay this fee:
Insured Return Envelope Fee: Pay Courier Pass Back electronically via Thailand Post Mart website. (If the page appears in Thai, you may use a translate function into English at the top right corner of the page.) A printout the electronic payment confirmation Please provide invoice number THP________________________
I found the https://www.thailandpostmart.com/ site but no idea how to purchase this