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These are some of the things you can do to ensure you do not have a Conflict of interest. Make sure that you include all contacts not just Active contacts - See Contact - Search
Search the contacts to see if either parties are in your contact history and review what capacity
Is there other information you have about someone related that will create a conflict of interest?
If you know that a contact has been involved in a prior case, check your Documents Register to see if any items could cause conflict.
Check in with your own memory – have you acted for either party in a past life/at a previous firm?
Is there any other info that would create a conflict ?
Remember that it is your responsibility to determine if there is a conflict for yourself.
Document who has signed off on the conflict check on the matter screen