I just wanted to get some opinions.  I shipped out some shoes to the shipping address listed on paypal and ebay for the buyer.  The package according to the usps website says it is undeliverable (it must be address issues, there was appropriate postage).  The buyer has a slightly different address that was sent 2 weeks after they received one of those automatic shipping emails from paypal saying their package was sent out.  Who is at fault here?  I sent out the package to the address that was provided on ebay and paypal, the package is going to be coming back.  I don't have a problem resending the package back out once I receive it, but who should be responsible for the postage for the 2nd try?