Backdate (verb)

To date a document, check, or agreement with a date earlier than the current date.

Origin:

Back + date , with back meaning prior or behind.

Examples:

1. The manager backdated the document to make it appear that it was signed earlier.
2. The company was accused of backdating stock options to inflate executive pay.
3. The lawyer backdated the contract to ensure that it would be valid.
4. He backdated the check so that it would clear before the payment was due.
5. It is illegal to backdate a document in order to deceive or defraud someone.