The Reference Key is an internal identifier you give to an assessment when you are creating it. It is an alphanumeric code that you can use to identify your assessments - as it does not need to be unique for every assessment, you can use the Reference Key to group related assessments together for easier searching and filtering. To learn how to search and filter your assessments, please see our Knowledge Base article Here.
The Transaction Reference is found on the Assessment List in the "Reference Key" column:
The Reference Key can also be found in the "General" tab of the assessment Report:
From this screen you can also edit the Reference Key. To learn how to do this, please see our Knowledge Base article Here.