>> Not credible that anybody in a large chain would have targets for requesting proof,
Perhaps not a target set by HQ but quite plausible that a junior or intermediate manager would interpret a requirement to show that a robust challenge policy is in place as a target of so many 'stops' in a shift.
Such things certainly happen in Government Departments, for example immigration decisions or Mandatory Reconsiderations by DWP where an expectation that fewer than say 20% will succeed.
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