> For the complete documentation index, see [llms.txt](https://support.iafcertsearch.org/accreditation-bodies/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.iafcertsearch.org/accreditation-bodies/error-handling/resolve-data-check-issues.md).

# Resolve Data Check Issues

The Data Check issue may appear during the initial data validation process, which always takes place after selecting the files you want to upload.

### **What is Data Check?** 

Data check is a validation process where the system checks your data for the following issues:

* Missing required data
* Data duplication
* Data inconsistencies
* Data discrepancies
* Invalid data

## To Resolve Data Check Issues

1. Click the **'Data Check'** from the validation navigation within the data import process:
2. Once clicked, a list of all the fields that are unrecognized by the system is listed in the main content area.

<table data-header-hidden data-full-width="true"><thead><tr><th width="180"></th><th width="483">Description</th></tr></thead><tbody><tr><td><strong>Sheet Tab</strong></td><td>Sheet tab of where the error is seen</td></tr><tr><td><strong>Field Name</strong></td><td>Field Name of where the error is seen.</td></tr><tr><td><strong>Row</strong></td><td>Row Number of where the error occurs</td></tr><tr><td><strong>Data Value</strong></td><td>Data value from the source file</td></tr><tr><td><strong>Error</strong></td><td>Error description</td></tr><tr><td><strong>Suggestion</strong></td><td>Suggestion how to resolve the error</td></tr></tbody></table>