Final answer:
The Duplicate UFID Indicator is the primary tool used to flag potential duplicates of a client's Unique Identifier (UFID), ensuring data integrity.
Step-by-step explanation:
When dealing with a client’s Unique Identifier (UFID), it is crucial to ensure that there are no duplications to maintain data integrity. The tool primarily used to indicate that a client might have a duplicate UFID would likely be the Duplicate UFID Indicator. This tool is specially designed to scan through records to find and flag potential duplicates of a client’s UFID.
Other options listed, such as the UFID Checker or Client Tracker, may assist in different aspects of UFID management, but the Duplicate Identifier sounds like it would be specifically geared towards identifying duplicates. Understanding the functionality of these tools is important to prevent data errors that could arise from UFID duplication.