I had the opposite happen, I actually delivered the buyer's item, then 6 days later she sends me an email saying "I haven't received it". Replied with, I personally delivered it, put it in the letter box (which was built into the wall and only accessible from inside the house), so I know she received it. She was peeved because she paid postage and I delivered it, despite it being 30+ mins away (would have cost me more in petrol) so she threatened to open a dispute, (blatant fraud), so I refunded her postage and change the postage to pick up so she couldn't open a dispute. What a cheek!