A relative of mine traveled to Spain with a Turkish passport from South America. She didn't knew she needed a visa for Spain and was allowed boarding by the airline.
Upon arrival she was held in a "detention room" uncommunicated for 24 hours (she was treated well by Spanish authorities though) until she was deported for failing to have the correct documents. As standard procedure she was assigned a lawyer who told her that airlines pay penalties when this happens.
My question is, can she request a refund for being allowed boarding despite being inadmissible?