What is the origin of if it isn't documented it didn't happen?

The phrase "If it isn't documented, it didn't happen" emphasizes the importance of record-keeping and documentation in various fields, particularly in business, law, and academia. Its origin is somewhat unclear, but it reflects a broader principle in professional environments that relies on tangible evidence to validate actions, decisions, or events. This concept underscores the idea that without documentation, claims can be easily disputed or disregarded. It serves as a reminder that memory alone is often unreliable.