Unauthorized FBA refund, no return

I luckily rarely get returns but I’m perplexed by a recent one. Buyer bought 3 identical items about 2-3 weeks ago. They requested and received a refund for 2 of the 3 items today. But there does not seem to be a return of the items initiated. No tracking number. And nothing that says they will be returned.

I had one return last month and I was given the control of when the customer was refunded, which was precisely when I got the merchandise back in good order.

Both times I sold on FBA. Do I have any recourse if the buyer never sends back the items? I don’t have “returnless” refunds turned on anywhere. I also don’t see the refund in the refunds area of “Orders.” I only got an email saying this happened and can see 2/3 items had been refunded.

Doesn’t look like safe-T claims can happen with fba. These are items sold for >$100 if that’s relevant.