to the original protocol. In accounting, it refers to documentation of detailed transactions supporting summary ledger entries. This documentation may be on paper or on electronic records. In online proofing, it pertains to the version history of a piece of artwork, design, photograph, video, or web design proof in a project. In clinical research, server based systems such as clinical trial management systems (CTMS) require audit trails. Anything regulatory or QA/QC related also requires audit trails. In pharmaceutical manufacturing, it is a Good Manufacturing Practice regulatory requirement software generate audit trails, but not all software have audit trail functionality built-in. The first 'generic' audit trail generating software came out late 2021. The software is called Audit Trail Control, capable of fulfilling regulatory requirements for any software used in pharmaceutical manufacturing. In voting, a voter-verified paper audit trail is a method of providing feedback to voters using a ballotless voting system. References Trail