You should win the claim, but you should do your best to assist. Some things to consider for claims like this. Does the buyer live in an apartment? If so, most apartment buildings have a large parcel mail box. Many times the package is in there and they never got notified by the carrier. I always suggest they try to contact the carrier. Usually they will remember their specific deliveries if you get a hold of them before too much time passes. I had a similar case two days ago. Buyer cooperated, contacted the mail carrier. Contacted the post office. Package was delivered today....two days after it was scanned as delivered. Kicker is...He lived directly across the street form the P.O.