Just a heads up for people with children who are applying for an extension...my husband and I just got our extensions yesterday but we brought our baby with us. The officials tell you that you do in fact need to extend for everyone, including babies. I'm assuming from what I've read on here, that it is technically required, although many people just don't do it because there is no fine up until about 14 years old. We didn't do it for our baby but may go back and do it, if it will cause problems down the line. Is it truly OK not to get baby an extension and then come back next year? If anyone is attempting this, I suggest not bringing the baby or child with you.
TLDR : Answer Summary
This post discusses the necessity of visa extensions for babies and young children in Thailand, noting that while it's technically required for all family members, enforcement may vary. The user shares their personal experience of not extending their baby's visa and raises concerns about potential future implications, especially concerning school enrollment, while various comments provide insights on the legal nuances and practical considerations involved.