Why expiry is the most common file failure
Assembling a file is an event with a deadline and someone responsible. Maintaining it is neither. That asymmetry explains why so many otherwise well-run sites hold complete files full of superseded documents. Nothing prompts a review, the documents look identical, and the person who assembled the file has usually moved to other responsibilities. The document itself gives no warning either, since an expired certificate looks identical to a current one until somebody checks the date printed on it.
The consequence varies by document. An expired insurance certificate means the site cannot demonstrate cover for the current period. A lapsed screening record may mean a person attends who no longer meets the site's requirement. A stale induction record describes a briefing given for a layout that has since changed. Each is a different problem and all have the same cause.
