# Check Signals

Data integrity is of primary importance to MeasureOne and we employ many techniques to ensure it. Check signals are signals raised by a collection of checks that are applied to the information that flows through the MeasureOne platform. Check signals provide information that helps you detect potential anomalies in the data processing workflow that may indicate fraudulent information or activity in the workflow.

Check signals checks are performed throughout the workflow with specific focus on Items, Connections & Services. The check signal checks can be broadly grouped into the following categories.   
   - **Connections**: Detect anomalies related to account connections.  
   - **Document Metadata**: Identify inconsistencies in document metadata.  
   - **Visual**: Flag formatting and visual discrepancies in documents.  
   - **Data**: Highlight inconsistencies in data.  

We are continuously monitoring and updating the collection of checks to ensure the highest level of data integrity through our platform.

The following is a list of all currently supported check signals raised, along with the conditions that cause them to be raised:
       
         
 
 ###### **Document Metadata Signals**
 | Signal Name           | Condition  | Comments|
 |----------------------|-------------|-------------------|
 | METADATA_MISMATCH  | Identifies anomalies in document metadata by comparing it against expected standards, detecting discrepancies or irregularities | Structured PDFs only |

 ###### **Visual Signals**
 | Signal Name          | Condition  | Comments|
 |---------------------|-------------|---------------|
 | FONT_MISMATCH     | Discrepancies in font usage, indicating possible text alterations | Structured PDFs only |       

 ###### **Data Signals**
 | Signal Name                           | Condition  | Comments|
 |-------------------------------------|-------------|----------------|
 | IDENTITY_MISMATCH                 | Inconsistencies between provided identity details and extracted documents data. Check for identity details such as Name, SSN, Employee ID, TIN, etc. |  |        
 | GROSS_PAY_CALC_MISMATCH           | Discrepancies in gross pay calculations |  |
 | NET_PAY_GREATER_THAN_GROSS        | When the net pay greater than gross pay, indicating a possible error or manipulation | |
 | W2_SOCIAL_SECURITY_WAGE_OVERLIMIT | When the reported Social Security wages exceeds the legal limit | |
 | W2_INVALID_SOCIAL_SECURITY_TAX_WITHHELD | When Social Security tax withholding amounts is incorrect | |
 | W2_INVALID_MEDICARE_TAX_WITHHELD     | When Medicare tax withholding amount is incorrect | |
 | W2_WAGES_GREATER_THAN_MEDICARE_WAGES     | When the reported wages exceeds the Medicare wages, indicating a possible error or manipulation | |

To enable check signals for your account, reach out to us at support@measureone.com.