Buyer has moved

Australia Post returned a package that I sent indicating the addressee is not at the address provided. That was over a month ago. Messages to the buyer were unanswered until yesterday where they indicated they did indeed move and a new address was provided.

I contacted Ebay and they've suggested I send it because they have seen the buyer's reply with the new address. They've also indicated I would also have their protection for sellers because of the messages. Whatever that means. However, Ebay couldn't tell me if this protection also protects me against chargebacks and suggested I contact PayPal. So what protection is Ebay providing if I was to send it to the new address?

The advice had always been to send it to the Ebay / PayPal address provided on checkout. So I'm rather surprised Ebay suggested I send it to the new address! Anyone know what "security measures for sellers" they have and it actually means?