@Bobby *******
Yes... that was why I wanted my existing 'SPOUSE' type 'O' visa extended. They yelled at me that I could not extend the original visa, had to apply here in Thailand and THEY, NOT AUSTRALIA!!! issued visas (the original Visa is a proper embossed Royal Thai Immigration Service visa) and disputed when I said I was entitled to ask for that to be extended literally yelling at me that I wasn't a lawyer and demanding how I knew. I said from the Royal Thai Immigration Web site... (we were in a Royal Thai Immigration office!!!) I suggested he look it up on their own web site... He demanded WE SHOW HIM so my wife googled Thai marriage Visa there in front of him and clicked on the Royal Thai Immigration Service Web Site and up popped the information that 12 month marriage type O visas could be and should be extended annually through a straight forward procedure at a Royal Thai Immigration Service Office in Thailand... Same conditions for renewal as for issuance... being properly married, living together and maintaining the bank account. He still refused to extend the visa and insisted we reapply for a new marriage visa.