Since Paypal introduced their marketplace system it has become possible for sellers to provide the shipping information to the transactions in their Paypal account.
It's NOT recommended to use this feature as it will cause a delay in releasing the payment.
When an order is accepted in our system we send Paypal a trigger to release a payment, but when there's tracking info provided within Paypal our triggers won't get processed immediately. Paypal waits with the release after they checked the delivery and this may take one till several weeks.
In a case of a dispute PayPal will request the shipping information at a later stage. It is useful information to have but to speed up the payout from PayPal we advise not to supply the information upfront.