Work permits are not transferable. You (it should be your employer)has to apply to the relevant Ministry to get one for you to work legally in that company. In a case of an office job it is the MOEA(Ministry of Economic Affairs or something like that). I think now they are streamlining this whole process though, so responsibilities for issuing work permits are going to some other department.
For teaching: it is the Ministry Of Education
Basic requirement to get a work permit for teaching in a bushiban is an undergraduate degree
Office job: Ministry of Economic affairs
2 Years post degree
a PhD and zero years experience
There are other combinations too like if you have been in your profession for 10 years, they do not ask for a degree.
ARCs are not transferable but it appears so sometimes
What happens is when you apply or in the process for applying for a new work permit after your old compnay has cancelled your work permit, the Police give you a period of grace either by extending your visa or extending your old ARC (but you have to show proof that the work permit application has been filed) in which time the work permit will be processed. Then you get your new ARC based on your new work permit.
I doubt my explaination is perfect here, but as I understood it, this is what happened to me
Don’t get your company to cancel your work permit. They do not even have to pay you a salary. As I understand there is no cross checking done between the Tax office and the “ARC office”.
What I mean is the MOFA do not check with the tax office on whether a salary as stated in the work permit application is actually being paid.
To give you an example of this, one time I turned up at the tax office filing taxes from two different employers and filed these with no problem, eventhough my ARC was with one employer.
The tax office have no interest in if I was working legally for both companies and were not going to inform on you if you are, they just wanted me to pay taxes on all income derived in Taiwan.
Then do some work on the side, but be careful in case the school or company you work in ILLEGALLY gets raided cause you are going to get kicked out and black listed for 5 years.
I am unsure how long they will allow you to continue with an ARC based on the work permit provided by them after you leave. You would want to check with them. They say it now to you as they maybe feel guilty for giving you the bullet, but I would not depend them extending this for the remaining two years.
I know alot of employers who would not feel comfortable with this situation