Antedate(redirected from Antedatar)
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The practice of placing a date that has already passed on a contract or a check. On its own, this does not invalidate or negatively impact the contract or check, but it may affect how long it remains valid. For example, one may sign a 12-month contract on February 1 but antedate it to January 1. Because the contract then states that it expires 12 months from January 1, it has effectively become an 11-month contract. See also: Post-Date.