What should be done when “NO M KEY” displays on the PIN pad?

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What should be done when “NO M KEY” displays on the PIN pad?

What should be done when “NO M KEY” displays on the PIN pad?

This response will flash on the PIN pad after the debit card has been swiped through the terminal. The PIN pad will go back to dashes across the PIN pad. This means the PIN pad has lost it’s encryption and may be replaced. Contact The Merchant Solutions for further support.