My ex-gf had prepared all the marriage documents for us.
3 weeks later I married another Thai lady, using the documents the ex had procured.
2 weeks after the marriage I applied for a marriage extension.
My exs brother was the immigration officer that visited the house, he said I'll make sure this is refused.
Extension granted, he managed to delay the process by losing the application, so it took 8 weeks for the confirmation stamp.