Clerical error

The motorboat Owaissa, hauled out of the water sometime prior to her service as the United States Navy patrol vessel. The notation "Katie" is a clerical error by someone who mistook the photograph for one of the motorboat Katie, which later served as the United States Navy patrol vessel
Rose Mary Woods demonstrating the "Rose Mary stretch" by which she claimed that she accidentally erased 18+12 minutes of the "Watergate tapes" during a phone call.

A clerical error is an error on the part of an office worker, often a secretary or personal assistant. The phrase may also be used as an excuse to deflect blame away from specific individuals, such as high-powered executives, and instead redirect it to the more anonymous clerical staff.

A clerical error in a legal document is called a scrivener's error.