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tr.v. post·dat·ed, post·dat·ing, post·dates
1. To put a date on (a check, for example) that is later than the actual date.
2. To occur later than; follow in time.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Banking & Finance) (of a cheque) showing a date later than that when the cheque was actually written
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014