backdate
UK /bækˈdeɪt/ US /ˈbæk.deɪt/
verb 1noun 1
Definitions
verb
1
To give or assign a date to a document that is earlier than the current or true date.
noun
1
An assigned date that is earlier than the current or true date.
The backdates on the clearance forms made the little man's papers worthless […]
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