What are the consequences of quitting a job on a 1-Year Non-B Employment Visa without notifying anyone?

The difference and why terminology is so important:

Extension of Stay, the big stamp from Immigration office,

This has to be cancelled on your last day of working as you signed to do when you applied for this Extension of Stay.

You then have just a few options, or apply for a new Extension of Stay based on any reason you can meet the requirements,

If you can not meet any requirements, you have to leave the country.

If you do not cancel this Extension of Stay, you might get fined when you apply for a new Extension of Stay in later days, with a 500 Thb overstay fine from your last day of working until the day you applied again, with a maximum of 20.000 Thb.

Most Immigration offices send you back to the office where the not cancelled Extension is stamped in your passport to cancel it first, before continue your application process,

The difference and why terminology is so important:

The visa sticker you bought at the Thai Consulate before enter Thailand,

Single Entry Visa will stamped used and become invalid on entry, you get 90 days of stay. These 90 days stay valid if you work or not,

1 Year Multiple entry, This visa stays valid until the valid until date mentioned on the visa and can not be cancelled by employers.

You can keep on using this visa as normal and doing border runs every 90 days for a new 90 day entry

What is the ending date of your current permission to stay stamped in your passport?

What was the date you left your job?

What do you call a 1 year non-b employment visa, is this a sticker from a Consulate or a stamp from Immigration?