Yes you need to prove postage - items are not being scanned in - at all, with click & send there is a history section - it has the item you have paid for & info which is suppose to be all Paypal need for proof - but if there is no tracking event i can not prove i actually sent the parcel - buyers are complaining as when they use the tracking - it just say Australia post has recieved information - they assume i have not sent it , Paypal do not require signature only proof that it is posted. even items i have paid for with signature on delivery are still not scanned in or still in transit ( luckily they have been recieved)