@in_461829,
This can be simplified; the important aspect for you is that you sent items for which a chargeback was initiated. Under eBay's Seller Protection, as long as you sent the items with tracking and so on.
eBay's Help page Handling payment disputes as a Managed Payments seller outlines what you need to do.
❝When a dispute is filed by your buyer, you may choose to:
Accept the dispute so the buyer receives the refund, or- Challenge the dispute and provide evidence or additional information, such as proof that the item was delivered to the address specified in the order details.
Information that can help when responding to a payment dispute:
- Tracking information showing the order was delivered successfully to the address specified in the order details
- Detailed photographs of the item from the listing showing the item's condition, including proof of authenticity, if applicable
- Relevant correspondence between you and the buyer working to resolve any issues
- Validating buyer identification for a Click & Collect (from the retailer) transaction❞
(Rubrication mine; strike-out also mine.)
The same page also describes how Seller Protection works.
❝Seller protections
If the transaction is eligible for protection, we'll cover the amount of the dispute, and waive the fee in the following situations:
[...]
When a buyer reports that they don't recognise the transaction:
You have provided proof of delivery, which includes all of the following:
- Tracking number provided by the carrier company (uploaded by the date in the payment dispute notification);
- A delivery status of "delivered";
- Date of delivery;
- Recipient's address, showing at least the city/suburb or postcode (or international equivalent) that matches the address in the eBay order details; and
- Proof of signature confirmation, if an order has a total cost (including postage and any applicable taxes) of $750 or more, uploaded as an image while contesting the payment dispute.❞
(Again, rubrication mine.)
As long as you send via a tracked method, and - if the item's cost is $750 or more - you have signature on delivery, you will be covered in the event of a chargeback. (That's assuming that you provide the required information shown above, in the dispute process.)
If you don't use tracking, and also if you don't provide the information above (tracking number plus the "delivered " status for the tracking number, indicating the date of delivery plus the recipient's address for the tracking information), you will NOT be covered by Seller Protection.
Don't get caught up in trying to get eBay to prevent the type of fraud; just focus on your Seller Protection so that you are not out of pocket. Protect yourself by sending via tracked methods. Be wise about the countries to which you will send.
I hope that helps.
