Someone returns a product to me with a missing unit, how do I resolve this?

[shoptv4]

Someone returns a product to me with a missing unit, how do I resolve this?

[comics-scifi-collectibles]

@shoptv4 

The eBay Money Back Guarantee overrules your returns policy.   Your return policy only applies if the buyer files a buyer's remorse return:  Doesn't fit, changed mind, etc.  

If you do not accept the return willingly then the buyer can ask eBay to step in and forces a refund. You do not get your seller's fees back, you get a defect and the buyer may be allowed to keep the item.

*******If the buyer abuses the eBay MBG in some way then you can report them but it doesn't get your money back:

https://www.ebay.com/help/selling/resolving-buyer-issues/report-issue-buyer?id=4084&st=12&pos=3&quer...

Sellers have protection for return abuse if they offer FREE RETURN shipping on their listings OR if they are a Top Rated seller and offer 30 days or greater returns.  The seller can then reduce the refund amount by up to 50% if the buyer sends a different item or somehow reduces the value of the item.

Seller protection: 
https://www.ebay.com/help/policies/selling-policies/seller-protections?id=4345&st=12&pos=4&query=Sel...