Check and Double Check - Wikipedia

Independent Double Check

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Two color double checking icon from user Vector Image

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Double Check Your Bookkeeping In These Five Ways

Can double-checking things be a bad idea? - Barking Up The Wrong Tree

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How to Endorse a Check to Someone Else in 4 Steps

Independent Double Checks: Undervalued and Misused: Selective Use of This Strategy Can Play an Important Role in Medication Safety