12 ms·In what way are Oyster cards/credit not refundable?by sammoth 9y agoIn what way are Oyster cards/credit not refundable?isostatic 9y agoDon't you have to take them to a ticket office?cjsuk 9y agoOnly works in some stations and most refuse to deal with it. The there’s the online refund system which is unable to process a refund half of the time.