Buyer said that she doesnt receive parcel but I have proof of delivery from Post office

[micromikro]

Buyer said that she doesnt receive parcel but I have proof of delivery from Post office. What should I do? 

[tobiasd4]

If you didn't add tracking to ebay when marking as posted, which you should,

then add it to case now, case should close in your favour.

Ask buyer to check around property & neighbours.