In terms of a brick-and-mortar retail or other business services environment, it's a different ballgame and corporations...
need to walk the fine line between causing the transaction to be painful for the customer and ensuring that it is secure. Again, it gets back to an organization's tolerance for risk and to what degree a company wants to inconvenience its customers by making them bring all sorts of supporting documentation to prove who they are.
The final point I'll make is that employees need to be trained to spot fake credentials and to ask the appropriate questions if they get suspicious. If employees don't enforce with the same level of scrutiny, then the tightest policy in the world won't matter too much. An enterprise also needs to have a defined process to deal with such situations quickly and effectively. Front-line employees shouldn't solely bear the brunt of a hacker that is trying to commit fraud.
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