@Frank *********
yes, I'll try that. I got this information from the U.S. Embassy website, it doesn't indicate that "they" need a copy of the divorce decree. The website does mention that the local Amphur might need it but we've already checked with them and they don't.
3. On the date of your ACS appointment ensure you bring the following:
Appointment Confirmation Page
Passport
Appropriate fee and method of payment: $50 for the affidavit and $50 for the Certified Copy (if required)
Completed affidavit (All information must be filled completely and correctly and NOT left blank. The information is REQUIRED by the Thai Ministry of Foreign Affairs)
A clear copy of the first page (bio-data page) of your passport if a certified copy is required by your Amphur