There are many regulations in place for most countries before we can list on a short term platform so take a look at the link below which explains to hosts based in Greece what they need to do:
Always double check with your local authorities too as regulations are changing fast and restrictions are being put in place to limit the number of STR's in a lot of countries
So is this an old listing you had on Airbnb and that you want to reactivate? A lot has changed over the years on Airbnb too and the usual place to put our registration numbers is under Regulations.
My listing is with the new Photo Tour so you may see something different.
Tell us as much as you can so that myself and other hosts can help you the best way we can.
Our experienced hosts @Joelle43 and @Helen3 have shared very apt advices below. Have you had a chance to explore the help centre article and also managed to apply for the short term license?
We'd love to hear how you're progressing with re-listing your property. All the best!