There it goes. Double-payment refunds would be appreciated at the address which sent them. 18ZWfzyX7bWNHWgY9CtV2R4cYriCF4yvErHi,
Bitcoin? Never heard this before...
What about "bank error in your favor" (Bankirrtum zu ihrem Gunsten) ?
Just kidding. I sent them back.
https://www.biteasy.com/blockchain/transactions/1d858fe1528fdd2bdeb28c5581f64fa03a884c12b7b1b9101f78bfadafd99582