Merge of accounts may appear as incomplete or partially completed. This could include Accounts that have a termination code of "MG" for merged but have no merged account id.
If there is no Merged Account ID and Names have not been deleted, then the account has essentially not been merged. The user can go to the merge screen and clear the termination code and set the status back. Set the Status to D and the termination code to MG.
Note: This outcome is sometimes a result of conversion data.