From Greece, Diners club is accepted under the Discover option. I had this problem, after the AMEX left from Greece and my card change to Diners. I asked, by email, PayPal and the support answer me that they do not accept Diners. As I dig some more to my bank page, I find that Diners is Accepted worldwide under the Discover. I can even verify it. I hope this help someone. Sorry,if I make mistakes, English is not my language.
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