It is the ticket, and no other documentation (for example a receipt), which gives you the right to travel. You will have to buy a new one or we will give you an Unpaid Fare Notice or Penalty Fare.
You then have 21 days to find your lost ticket and show it to us and apply for a refund or appeal the Unpaid Fare Notice or Penalty Fare Notice. The appeal process for this is clearly written on both the Unpaid Fare Notice or Penalty Fare Notice issued.