The 'Activity log' gives a detailed view of all the activity that has been undertaken by your Collaborator account, this includes invitations to Collaborate, changes in access and records of agreements being signed off. If something doesn't look right in the activity log, contact Enable by raising a ticket on Cello.
You may filter this by Trading partner or if you leave the search empty, you may view a history of all your activity. When viewing all your history, two more columns come into view. You can view the owner, this will be the Enable customer who has asked you to collaborate and you may see the partner which is the company that you represent.