What are the current paperwork requirements for a marriage-based visa extension in Savannakhet?

To extend your visa based on marriage in Savannakhet, you will need to prepare the following documents: a passport, a completed application form with two passport photos, a signed copy of the passport's front page, the original marriage certificate, a signed copy of the marriage certificate on a single sheet, a signed copy of the wife's ID Card on a single sheet, a signed copy of the wife's house book, and a fee of 5,000 baht for the Non Immigrant ‘O’ Visa. Note that you obtain a new visa rather than an extension, which is processed at immigration offices within Thailand.