Occasionally, you may need to merge duplicate user records to improve reporting (eg, donations credited to duplicate donor records) or avoid confusion (eg, a user places online bids from separate accounts (eg ticket vs donor).
To Merge User Records:
Go to Admin > Manage Users
Note: If both users have a ticket, you will need to return or unassign one of the tickets before merging. Also, you cannot merge business and individual user records, you will need to edit one of the user record types before merging.