Card Failed Luhn Test Error

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When entering a credit card manually Chorum may return the following message: CardFailedLuhnTest.

• The message indicates the card number entered does not pass the industry wide algorithm used to verify if a credit card number is valid. 
• The card may have been entered incorrectly or the card number may not be valid.  Verify the number and try again. 
• If the error persists confirm the card number with the guest or request another form of payment. 
• Chorum and the credit card processor will not accept a card that does not pass the Luhn test.