The public charter school movement is premised on the exchange of increased autonomy for increased accountability. Individual schools are given more flexibility in their actions, and then must meet agreed-upon benchmarks of quality. If a school fails to fulfill the terms of its charter or achieve its stated goals, it can be closed. However, charter schools that are identified for closure do not always shut their doors. Even as charter school authorizers have become more adept at evaluating school performance and enforcing accountability, some schools have tried to avoid closure altogether. One way that schools evade closure is through authorizer shopping: when a struggling school transfers to a new authorizer to avoid accountability. Experience shows that authorizer shopping is a threat to a state's overall charter school quality if even one authorizer is willing and able to accept failing schools. This report discusses the problem of authorizer shopping, and offers recommendations on how to prevent it.