How do I give PayPal a return tracking number for a dispute?

[gaussian]

Hi,

I opened a dispute(not a claim) a couple of days ago, and the seller sent me an offer that he will send me a refund after he receives the returned item. But how do I give PayPal a return tracking number? And it's weird that seller added an irrelevant tracking number after I filed the dispute. So now my transaction has two tracking number. I just afraid that seller would do this kind of thing to scam me. What should I do in this case?

Thanks!!!

[sharpiemarker]

@gaussian 

Contact customer service for assistance with this:

Click HELP at the top menu, scroll down to click CONTACT US, and then scroll down to click CALL US.