audit trail
noun [ C ]
ukus ACCOUNTING
documents and records that show the history of a company's financial activities, examined by someone who is doing an audit (= checking a company's accounts):
The audit trail must be supported by sufficient documentation to follow a transaction from beginning to end.
You should maintain an adequate audit trail of all transactions.
IT
a record of the activity on a computer or computer system:
It's important to keep an audit trail to see who has changed a document and when.
The database provides a full audit trail of activity.