You can’t move your responsibility to the buyer. You will always be responsible for the shipment, regardless telling your buyers you wouldn’t.
We are facing fences and surveillance cameras everywhere because we are afraid everyone could be a thief or terrorist. But how many bad guys are out there? 1 in 100? Or 500?
We offer oversize lettermail shipping for 4 years on eBay, Amazon, Walmart, our own store, and now on Tindie as well. If 1 of 500 customers claims not having received their order, we pour another coffee and klick on “refund”. That’s business. No risk, no business. But we hope the 1 who betrayed us will be hit by a train