Ciao Marco,
Welcome to our forum - and to Tuscany soon!
I can't speak from personal experience in this case but I don't believe you'll encounter problems showing up and asking to register or play.
Closest to Arezzo is Golf Club Casentino near Poppi (with a great view of the castle).
From the fees, you can see they have options for annual registrations for non-residents.
http://www.golfclubcasentino.it/?page_id=65
La Bagnaia is about the same distance, a bit to the southwest of Siena
https://www.royalgolflabagnaia.com/e...e-golf-course/
Look into the one near Perugia, which should also not be too far from Arezzo and maybe closer than the ones closer to Florence
https://www.golfclubperugia.it/
Ugolino is in Chianti to the south of Florence
http://www.golfugolino.it/it/prices
Do share with us your experience

We learn lots in this way!
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