imjustme,
One thing I've found helps is I try to print out tracking labels and schedule the shipment ahead of time when I had time to do all my packing because I generally pack and ship everything on the same day as it's much faster. Then I go and tell all my buyers the address I shipped to and their tracking number. Then if they suddenly say "oh no you forgot my apartment number" I can fix it.
So if the buyer files a paypal dispute an hour later, you know he's a scamming you. And imjustme this one is clearly a scammer. You said he ordered them from you. I wonder if he's ordered from other sellers, too. Maybe he wants to resell all those items he got for free somewhere be it online or offline.
So if you did the label ahead of time then he immeditely does a "not as described" dispute, you simply can respond and claim that you shipped but you weighed it wrong or forgot postal rates went up and it was returned for insufficient postage so it got returned and you have to reship, but you obviously won't if the paypal dispute is open since it means a free item.
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