card in

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card in

To sign in to one's place of business by means of a magnetic or electronic identity card. All employees are required to card in at the beginning of each shift to ensure they are paid for the appropriate hours each day. Due to the highly confidential nature of our research, everyone has to card in at the security desk to gain access to any part of the facility.
See also: card
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

card in

Sign in to one's place of business by use of a magnetic card, as in I told him I'd card in for him if he was late tomorrow. Similarly, card out means to sign out of one's place of business, as in I want to sneak out early, so could you please card out for me at the end of the day? This term arose in the 1940s with the invention of automated check-in systems.
See also: card
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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