This report warns that the MBTA will likely face a fare evasion crisis when it transitions to all-door boarding on buses, the Green Line, and the Mattapan trolley in 2023. General Manager Steve Poftak and MBTA staff have signaled the potential for a $25–30 million spike in fare evasion costs when the new AFC 2.0 system is implemented unless the MBTA institutes meaningful, enforceable penalties for fare evaders. In this report, Pioneer Institute makes recommendations for managing the AFC 2.0 contract and related fare evasion procedures going forward.