What documentation is required to get a 1-year extension based on marriage in Thailand after the consideration period?

okay, in BANGKOK <- which is where the O/P applied for their yearly extension, after the 21 day under consideration stamp when you go back to get a year extension inked in based on marriage to a thai or raising thai children, you DO NOT need to show an updated bank book the day you go back

You take your passport, the blue-green receipt that shows you paid 1900 baht and go to the queue counter get a ticket for section L-2. They'll ink the year extension into your passport

You just go with your passport unless you got directions from the officer when you applied for an extension.