If I leave the country for a few days & I need a re entry permit can just apply at the Chiang Mai airport as I leave? Do I need photos or forms in advance?

Dear all, quick question on whether or not is it necessary to cancel the non-ed visa of my daughter.

We are moving countries at the end of December and my daughter (Dutch passport) has a 3 month non-ed visa (see attached) which will expire on Feb 10, 2024. She has not yet purchased the re-entry permit.

My question:

* Do we have to go to immigration and cancel this visa prior to leaving end of December?

* or can we just not purchase the re-entry permit when we leave the country which in my understanding would render it invalid?

As a background: she used to have 1 year in her previous passport which expired during our holiday so that she could not extend it and had to re-apply with the new passport and got 90 days Non-ed. So I guess it is not an extension.

Thank you in advance for your answer to our question.

Do I need to have an ASQ booked for my COE application or book once received ASQ. I have a flight provisionally booked