UNSUBSCRIBE ERROR

errorCode: Contains the numeric error code.
errorControl: Contains the name of the field that triggered the error.

Handling Errors

All errors are passed in the QueryString of the error page URL (see screenshot below), with the following variables:

Error Code	Error Description	Value Returned in errorControl
1, 6, 7, 9, and 10	An error has occurred while attempting to save your subscriber information.	Blank.
2	The list provided does not exist.	Blank.
3	Information was not provided for a mandatory field.	The name of the required field that the subscriber did not complete.
4	Invalid information was provided.	The name of the field in which the subscriber entered invalid data.
5	Information provided is not unique.	The name of the field in which the subscriber entered data that duplicates data already in your database for that field.
8	Subscriber already exists.	The list ID of the list to which the subscriber already belongs.
12	The subscriber you are attempting to insert is on the master unsubscribe list or the global unsubscribe list.	The list ID of the unsubscribe list.
13	The List ID or MID isn't correct	Check that the list ID and/or MID specified in your code is correct.
14	The query string contains ETsubscriberKey and the Subscriber Key feature is not enabled on your account.	The name of the field.