sold an electronic Ticketmaster ticket - now buyer is trying to scam me

[regoseller]

Hi, long time eBayer encountered the first time buyer is trying to scam me.

I sold an electronic ticket to a concert and immediately transferred to the buyer's email. Few days after the concert, he claims that he never received it. 

There is no tracking information because I transferred it to their Ticketmaster account directly. The listing clearly stated that I will do a direct transfer after auction is complete.

I have screenshots of the transfer, and receipt , and confirmation of transfer email from Ticketmaster to the address he gave me in DMs. 

How can I upload this evidence to the case that the buyer opened against me? 

[kensgiftshop]

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@regoseller wrote:

How can I upload this evidence to the case that the buyer opened against me? 

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You don't.

The only evidence they want is a tracking number that shows the item was delivered.

[regoseller]

how do I give a tracking number when it's a digital delivery of goods?