I am trying to register my Pantone product and receive a message that the 'serial number cannot be found in the database'.

This situation is often due to misinterpreted characters in the registration code (serial number) found in Pantone guides. Listed below are the most common 'problem' characters: Lower-case l as in letter, misinterpreted as upper-case I as in Iowa or the Numeric Zero (0) misinterpreted as upper-case O as in Ohio. Please try registration again using the above guidelines.