I feel it is the seller's responsibility. Never mail anything with out some type way to track it.
I ship only with a delivery service that requires the recipient's signature or I mail with USPS and always buy insurance and/or delivery confirmation from the post office.
or you could have the delivery registered or certified at the post office, so that the recipient/buyer is required to sign for it.
Not belly dance related but,
I ordered a kitchen aid mixer from sears. I asked them when it is delivered to make sure that
someone has to sign for it. Do not leave it at my door. That was wrote on the receipt.
I waited and waited and nothing. It was over 2 weeks. I went to sears and asked them to check on it.
They told me it was already delivered. I said who signed for it. They said No one it was left by the door!! I told them I never received it.
They were telling me It was not their problem. I gave them my receipt and it states do not leave in front of door , must be signed for. it took 2 months to finally get my item. (I was having medical issues and not always home)
I did find out which neighbor had the
5 finger discount. Charges were brought against him.
General Rule, Be aware that some scammers attempt to defraud sellers and buyers.
The best way to protect yourself as a seller against fraud is to ship with the USPS and buy postal insurance!