second-pair-of-eyes principle
Requirement that a business transaction be approved by at least two individuals.
EUR-LEX, Case C-169/04, [Abbey National ](http://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:62004CC0169&from=EN)plc and Inscape Investment Fund (joined party)v Commissioners of Customs and Excise, 2005.
Based on Collins English dictionary, [Definition of 'four eyes principle'](https://www.collinsdictionary.com/dictionary/english/four-eyes-principle) (2.7.2019).