Quote ="shauney"Another tip for those new to Oyster:
When you swipe in at the start of your journey make sure you swipe out even if the exit gates at the destination station are open. If you don't then it will appear as an unresolved journey and you'll be charged the maximum fare that you could have incurred on the network - £8.30 (when you swipe in it deducts £8.30 from your balance, when you swipe out it credits the difference in fares back to your card - don't swipe out = no credit)'"
Yes, very good tip and make sure it beeps when you do swipe it. I got an unresolved charged a couple of weeks ago even though I thought I had tapped out. Although to be fair, they did refund it when I challenged it.