I have a Non-Imm "O" retirement which expires Dec 25th. However, due to family commitments, I have to stay until Jan 10th. What is the maximum length of extension I can apply for? I do not have the paperwork from the UK to show pension payments, nor 800,000 baht in the bank!

if Thai family you can get a 60 day extension, if not the only one you can get is another yearly retirement.

 

failing that a border hop for a 30 day visa exempt entry

You need give more detail. Do you mean A-O or non o based on retirement. Bit confused with your post. As far as I know...you don't get an extension on non-o based on retirement. You apply for 12 permission of stay. You can do that before you current permission of stay runs out. You need travel then get a reentry permit. 

Ubonjoe will give you definitive advice. Go with that

12 minutes ago, DrJack54 said:

You need give more detail. Do you mean A-O or non o based on retirement. Bit confused with your post. As far as I know...you don't get an extension on non-o based on retirement. You apply for 12 permission of stay. You can do that before you current permission of stay runs out. You need travel then get a reentry permit. 

Ubonjoe will give you definitive advice. Go with that

If he has a non O visa he can apply to have it extended. Up to thirty days, or sixty days for visiting his Thai family if he has one.

If he has a twelve-month extension based on retirement he doesn't have a valid non O and can only get a further twelve-month extension.

Gents

Much appreciated for all the replies. Just to clarify, it's a Non-"O" based on retirement.

14 hours ago, sumrit said:

If he has a non O visa he can apply to have it extended. Up to thirty days, or sixty days for visiting his Thai family if he has one.

If he has a twelve-month extension based on retirement he doesn't have a valid non O and can only get a further twelve-month extension.

no 30 day extensions on a non imm visa

8 minutes ago, bill014 said:

Just to clarify, it's a Non-"O" based on retirement.

Are you on a 90 day entry from a non-o visa or an extension you applied for at immigration?

Whichever one you have there is no short term extension you can apply for unless you are married to or the parent of a Thai.

You could leave and re-enter the country to get a 30 day visa exempt entry.

Joe. I'm on a 90 day entry visa. I am married (legally!!) to a Thai.

 

2 minutes ago, bill014 said:

Joe. I'm on a 90 day entry visa. I am married (legally!!) to a Thai.

 

You can apply for a 60 day extension to visit you wife at the local immigration office. 

You wife will need to be with you when you apply. You will need your marriage certificate plus a copy, copies of her house book registry and ID card.