That's if you use your bank cards, my post is regarding the metrolink season pass that City sell.You get fined £120 (pay later) or £60 to the inspector.
If you tap in but don’t tap out within 2hrs you get charged the max single journey of £4.60. If you start another journey after 2hrs and do the same you get charged another £4.60. The danger is if you “tap in” at the start of another journey within the initial 2 hrs then you are technically tapping out and risk the £60/£120 fine. A few have been caught with this especially if they use multiple cards by mistake.