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App Start PIN
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If you are seeing this page then the JAPER App has been setup to use the JAPER App Start PIN.
If you enter an incorrect PIN a failure penalty might occur, these include: email alerts, ever increasing PIN delays, purging of validations and app disabling.
Unless you know the PIN the only way to get the JAPER App to work on the device is to de-install, re-install and re-validate.