On the back of the form it has a part saying  'must attend in person unless disabled'.

Anyone got any idea how disabled you have to be for non-attendance?

Basically it means you are unable to travel to immigration to apply for a extension.

Get a doctors note confirming why you can't attend in person. You'll probably get a home visit.

23 minutes ago, IvorBiggun2 said:

Get a doctors note confirming why you can't attend in person. You'll probably get a home visit.

If unable to travel to immigration somebody else can do the extension for you. No home visit needed.

Thanks for answers.

3 minutes ago, ubonjoe said:

No home visit needed.

I was only quoting what happened to a farang that I knew who was housebound. He got a home visit but I'd imagine it all boils down to which office one comes under.

Eye opening comment on http://www.samutprakanimmigration.go.th/frequently-asked-questions/.

 

Quote

If you are sick or receiving treatment at a hospital, you can send someone on your behalf to renew extension of stay. But, you will need to get a doctor’s certificate to show the Immigration officer. Please note, if you overstay you will still need to pay the 500 Baht per day fine even if you have a doctor’s certificate.