Abstract: Embodiments herein describe an automated reconciliation system that can detect census data discrepancies between two computing systems and perform automatic reconciliation. A first computing system is a source of truth for the census data, while a second computing system maintains its own copy of the census data. When its census data is updated, the first computing system can push census event notifications to the second computing system so it can update its copy of the census data. In one embodiment, the second computing system includes an error detector to identify when a census event received from the first computing system results in an unexpected census state. In response, the second computing system can perform an automatic reconciliation to correct the discrepancy by requesting a history of census events from the first computing system that can be used to rebuild the census data at the second computing system.