To generate the notification would be a good solution also depend on the date of the event. (If you can tell me how 😉 )
However I’ll explain what I mean when I say that the ticket is no longer purchasable:
In wooticket section of event post there are 2 field, start and end date of sell (yellow in screenshot):
https://www.dropbox.com/s/ioa6mykoi7i714l/wooticket%20section%20yellow.PNG?dl=0
In this section I can choose the period during which the ticket is sold. During this time I consider it “purchasable” and before and after this time “not purchasable” 😀
@George Thank you very much