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Although the client - side validation checks the correct form of the booking reference, it does not actually check it is a valid booking reference.
Although the clientside validation checks the correct form of the booking reference, it does not actually check it is a valid booking reference.
For a reference to be valid, the serverside should validate the reference to the same format as the clientside, plus the following additional constraints: the threeletter group must be one of EGHONLDSC Anything else is invalid.
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