I didn't find a clear explanation anywhere but it was written [here at the Thailand immigration bureau website][1]:

> * Overdue notification is not accepted via internet. Applicant must
> contact the nearest Immigration Office in person.

It was further written in the same webpage:

> The applicant (or authorize someone to file for you,only in case of
> not overdue), must come to the nearest Immigration Office or Branch
> Office in your residence area. The applicant will need to bring the
> following required documents:
>
> * Your Original passport
> * Your departure card (TM.6)
> * Previous receipt of notifications (if any)
> * Completely filled in and signed notification form TM.47

## My problem

It is not clear to me how an overstay and overdue(staying) in Thailand differ one from the other.

It is especially unclear to me if "overdue" is a code name for what I can define:

> A special extension of generally any visa, due to some special
> unexpected event, such as a legal issue or acute, urgent medical
> condition (such as a car crash) or in extremely rare cases some other reason for the consideration of an immigration official or the king (whatever that might be).

## My question

What is the difference between overstay and overdue(staying) in Thailand?


  [1]: https://extranet.immigration.go.th/fn90online/online/tm47/TM47Action.do