Cash ...they love cash..cash is King.. and change it in Bangkok not your native country and make sure the bills are not damaged eg: torn or have biro on them ..just a bit of solid advice..
Renew now in your home country then you get all the visas new in your passport..you know what theye like over here getting visas tranfered.. more just time wasting for you ..so I would get a new passport and visas unless you like going to immigration 😂🤣
Well when I did my childrens renewal of there UK passports at the Trendy office building..they did it for me..but you just have to make sure you have all Thai certificates translated into English and certified..the rest was done with the consular section..they were very good and understanding also..all returned within 5 weeks..