Possible Unreasonable Request from Buyer

[waterdoggmom]

After having the item for approx 3 weeks, buyer sends me a message saying he is now missing a tiny part to the item and he wants me to find a replacement and send this tiny part to him.  I asked him to send me a photo of the problematic area.  I have a lot of photos stored of this item, and I believe the item was shipped to him intact and not missing this little part.  What seems to be happening here?  What should I do if he lost this part while item was in his possession, but he is now coming back to me for some type of resolution?  Thank you very much.

[mega-ma-roo]

If you can, send him the part. If you can't, the buyer may request a return/refund for a defective item. If the buyer does that, you will either pay for the return and refund or let the buyer keep the item and refund.