Statewide Longitudinal Data Systems (SLDS) provide the information and tools needed to inform policies, practices and decisions at every level to improve student achievement and system performance. It is equally important that there are policies and practices to protect personally identifiable information and to ensure the confidentiality and security of this sensitive information. Linking limited data elements from different sectors is sometimes necessary to generate actionable information that can be used to realize efficiency, assess impact, and make informed decisions about education. Based on state experiences, comments, and ongoing conversations, the Data Quality Campaign (DQC) Partners have identified the following four areas of continuing confusion: (1) Sharing between Separate P-(or K-)12 and Postsecondary Data Systems; (2) Disclosures to a Former School/LEA for Evaluation and Accountability; (3) Research Studies Initiated by State Agencies; and (4) Disclosures to Workforce and Social Service Agencies.