What documents are required for a Thai marriage visa application, and how can I obtain a copy of my marriage registration?

Hi guys looking for advice

I’ve just been to the thai consulate here in perth to apply for a marriage visa multi entry I had all paperwork and was asked for marriage cert which I gave them then they ask for a marriage registration paper also which I did not have so I rang my wife and she is of the understanding that there is no shush thing we got married in boing prue would they have this on record and if so would it be easy to get a copy

Thank you for any help