, the employer has to submit documents for WP permit application for Non-B visa application for an foreign employee, but work permit can NOT be issued until the employer is actually on entry stamp from Non-B visa.
, not totally correct really. Your employer has to submit the application for WP first to get the receipt of application (or pre-approval) <- not actual WP. You apply for Non-B visa with documents from employer including the WP application receipt. Then your WP is issued based on your Non-B, you can get your WP.
You cannot receive your WP without visa/extension that allows holding WP.
It is possible if your employer agrees to support you. You need a bunch of documents from your employer as well as your tax documents. You have to get the detailed requirements list from the local immigration office ASAP and talk with your employer immediately.
They may take time to prepare documents even if they agree to provide them, some have to be obtained from or certified by the government/official departments. Those include company registration, tax documents, etc.
If the current visa itself's validity ("valid until" or "must be used by" date on visa) is 9 December, you may want to consider bouncing for the last time on or before the date.
When you get your new passport, your old passport is invalidated. Your extension and related stamps on the old one are transferred to the new one. Those stamps have the same dates as those stamps in the old passport, it looks like several months of "rest of extension" are transferred to the new passport after the old passport is invalidated. It doesn't mean you had an extension longer than your last passport validity or any extra period was added.
You may be able to check your stamp on one of the early pages of your passport and the expiry date of your old passport.
, You can try to apply for one at the local immigration office or international departure airport on the day of departure. But I've never heard anyone successfully got a re-entry permit for visa-exempt entry.
I guess all you can do is try to apply. The worst thing is they say just no your nationality is eligible for visa-exempt, or, get a proper visa if not travelling.
Hope you are aware of how a re-entry permit works, even if you have an eligible entry/extension stamp.
A re-entry permit is valid as the same as your current stamp to keep your current stamp valid so that you can enter Thailand again using the rest of your valid stay, you will be stamped until the same day as the current stamp. A re-entry permit does not add any day to the current stamp.
For example,
Current extension "until" date: 20 January 2025
A re-entry permit validity: 20 January 2025
Your new entry date: 7 January 2025
Stay "until" date on your new entry stamp: 20 January 2025