The 2020 Census Memorandum Series documents significant decisions, actions, and accomplishments of the 2020 Census Program for the purpose of informing stakeholders, coordinating interdivisional efforts, and documenting important historical changes.

A memorandum generally will be added to this series for any decision or documentation that meets the following criteria:

1. A major program level decision that will affect the overall design or have significant effect on 2020 Census operations or systems.
2. A major policy decision or change that will affect the overall design or significantly impact 2020 Census operations or systems.
3. A report that documents the research and testing for 2020 Census operations or systems.

Visit 2020census.gov to access the Memorandum Series, the 2020 Census Operational Plan, and other information about preparations for the 2020 Census.