You make sure the tracking is on the item in your sold section. If you bought through ebay Packlink the it should be on automatically.
You wait until the buyer opens a Not recieved dispute.
You should win as ebay accept delivered or attempted delivery.
Why should Evri resolve it when they have tried to deliver 3 times?.
That is all they need to do.
If you do receive the item back then you wait for the Not received dispute and refund the buyer
Annoying but that is what you should do
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We are just ordinary members trying to help.