A lady had trouble using her Oyster at Hatfield yesterday, but luckily for her she was trying to get IN to the station, not out.
It was funny when she said she'd used it without any problems earlier to get to Hatfield (so I guess the gates were open) and the staff told her she'd been very lucky. As she was repeatedly trying to touch her Oyster on the reader (which doesn't have the Oyster logo but is still quite obvious as a reader) I am pretty sure she was totally genuine, and probably thought she'd touched out earlier. I guess the maximum cash fare will prove otherwise later!